Database Develop

Mi 5 4G+ interband or intraband?

As for the title, does the Mi 5 LTE+ is using interband CA or intraband CA in stock ROM/any custom ROM?
Since my country carrier is using band 3 and band 7 LTE mostly, and my current carrier claim that they using interband CA (although it's still LTE CAT 4, so the max bandwidth they do support is 20 Mhz) so my Mi 5 can't use their LTE-A hmmm

sss2sssss said:
As for the title, does the Mi 5 LTE+ is using interband CA or intraband CA in stock ROM/any custom ROM?
Since my country carrier is using band 3 and band 7 LTE mostly, and my current carrier claim that they using interband CA (although it's still LTE CAT 4, so the max bandwidth they do support is 20 Mhz) so my Mi 5 can't use their LTE-A hmmm
Click to expand...
Click to collapse
Hi, what's the difference between them? Also in my country there's the aggregation of b3 and b7 and with my mi5 I have never had 4g plus..

Skull_Devil said:
Hi, what's the difference between them? Also in my country there's the aggregation of b3 and b7 and with my mi5 I have never had 4g plus..
Click to expand...
Click to collapse
Interband is B3+B7
Intraband is B3+B3 or B7+B7
However after I research awhile and found that Mi 5 does can support Interband CA since just now I read from Taiwan forum, both Taiwan Chunghwa Telecom and Japan NTT Docomo can use their CA in Mi 5 as the attachment shown below
And both operators are using Interband CA, their config is show below:
NTT Docomo: CA_3A_19A, CA_1A_21A, CA_1A_19A_21A, CA_1A_3A_19A and more
Chunghwa Telecom: CA_3A_8A, CA_3A_7A_8A
And as for what I search, B7 have poor signal distribution, as for my operator I'm most seeing the B3 but B7 is really seldom come out

sss2sssss said:
Interband is B3+B7
Intraband is B3+B3 or B7+B7
However after I research awhile and found that Mi 5 does can support Interband CA since just now I read from Taiwan forum, both Taiwan Chunghwa Telecom and Japan NTT Docomo can use their CA in Mi 5 as the attachment shown below
And both operators are using Interband CA, their config is show below:
NTT Docomo: CA_3A_19A, CA_1A_21A, CA_1A_19A_21A, CA_1A_3A_19A and more
Chunghwa Telecom: CA_3A_8A, CA_3A_7A_8A
And as for what I search, B7 have poor signal distribution, as for my operator I'm most seeing the B3 but B7 is really seldom come out
Click to expand...
Click to collapse
I can assure you that b3+b7 doesn't work with mi5. I tried really hard to find out a solution but I never succeeded.
http://en.miui.com/thread-360460-1-1.html
This is a post in miui forum where other people had the same problem.. I also chatted with all the dev team trying to figure out something.. Is there something problematic with that and I don't know what it is.. (b7+TDD frequency bands works)

Skull_Devil said:
I can assure you that b3+b7 doesn't work with mi5. I tried really hard to find out a solution but I never succeeded.
http://en.miui.com/thread-360460-1-1.html
This is a post in miui forum where other people had the same problem.. I also chatted with all the dev team trying to figure out something.. Is there something problematic with that and I don't know what it is.. (b3+TDD frequency bands works)
Click to expand...
Click to collapse
But then with the Taiwan Chunghwa Telecom, their band is all FDD band, why in some post they reply it still can detect LTE+?

sss2sssss said:
But then with the Taiwan Chunghwa Telecom, their band is all FDD band, why in some post they reply it still can detect LTE+?
Click to expand...
Click to collapse
I honestly don't know, during my searches someone said to me that the problem is the kind of the spectrum (continous or discontinous). Don't ask me what does it mean cause I don't know.. Maybe this is nothing but that's the only answer that I found.. I tried with 3 different phones and I got the 4g plus, with mi5 no 4g plus. I tried all roms (china, global, third part roms) no 4g plus.. Just with b3+b38

Skull_Devil said:
I honestly don't know, during my searches someone said to me that the problem is the kind of the spectrum (continous or discontinous). Don't ask me what does it mean cause I don't know.. Maybe this is bull**** but that's the only answer that i found.. I tried with 3 different phones and i got the 4g plus, with mi5 no 4g plus. I tried all roms (china, global, third part roms) no 4g plus.. Just with b3+b38
Click to expand...
Click to collapse
Just now I'm also found that the spectrum distribute by my current carrier is also kind of hairwire, inside the house they are almost all B3 while when go to outside the house hey are almost all B7
This is kind of weird, and according to some forum they tell that my current carrier is really doesn't display 4G+ in major phone as they using 10MHz+10MHz (CAT4) which results some phone may just detect it as 4G signal

sss2sssss said:
Just now I'm also found that the spectrum distribute by my current carrier is also kind of hairwire, inside the house they are almost all B3 while when go to outside the house hey are almost all B7
This is kind of weird, and according to some forum they tell that my current carrier is really doesn't display 4G+ in major phone as they using 10MHz+10MHz (CAT4) which results some phone may just detect it as 4G signal
Click to expand...
Click to collapse
No way, that's not possible cause I checked with lte bands and I also checked the band used and I know for sure how much Mhz my carriers use in my country and that conclusion is not possible. I also have proofs that mi5 has no problem in detecting 4g plus as the sum of more bands with photos of lte bands logs.. I think that this problem is underrated and I found just few people to talk about it

I got some news, A friend of mine said to me that intraband is the sum of near frequencies (such as b7 and b38), this kind of aggregation is possible in every condition. The interband aggregation (such as b3 and b7) needs a chip called companion that helps to sum the download of distant bands (b3 and b7). Probably the mi5 does not have this kind of chip and so the only possible CA is the one with near frequencies.. I also tested it and it works. I don't know how to confirm this anyway but it makes a lot of sense.

Will the A3010 work well in Europe?

I'm about to buy a OnePlus 3T.
I live in Sweden and travel in Europe from time to time.
Will the A3010 work well for me (even with 4G)?
I have already looked at willmyphonework.net/ but it only says:
"Device is compatible with some of the network carriers frequencies. It may work."
What practical advantages would I notice with a A3003(European version) vs the A3010(China version)?

white-k said:
I'm about to buy a OnePlus 3T.
I live in Sweden and travel in Europe from time to time.
Will the A3010 work well for me (even with 4G)?
I have already looked at willmyphonework.net/ but it only says:
"Device is compatible with some of the network carriers frequencies. It may work."
What practical advantages would I notice with a A3003(European version) vs the A3010(China version)?
Click to expand...
Click to collapse
The main difference between OnePlus 3T A3003 and A3010 is the A3003 supports LTE band 1/3/5/7/8/20/38/40, which is the international model while A3010 supports LTE band 1/3/5/7/8/38/39/40/41, which is the China model.
basically you wont have support for this bands on 4G

white-k said:
I'm about to buy a OnePlus 3T.
I live in Sweden and travel in Europe from time to time.
Will the A3010 work well for me (even with 4G)?
I have already looked at willmyphonework.net/ but it only says:
"Device is compatible with some of the network carriers frequencies. It may work."
What practical advantages would I notice with a A3003(European version) vs the A3010(China version)?
Click to expand...
Click to collapse
The only LTE band that is missing on A3010 is Band20. Most of Sweden network carriers are using Band7 so you are good to go. When you go aboard is a different story. But you are also more flexible because you can chose the roaming network. All you have to do is to chose a supported network carrier.

alvin182 said:
The main difference between OnePlus 3T A3003 and A3010 is the A3003 supports LTE band 1/3/5/7/8/20/38/40, which is the international model while A3010 supports LTE band 1/3/5/7/8/38/39/40/41, which is the China model.
basically you wont have support for this bands on 4G
Click to expand...
Click to collapse
I'm confused by this. By those numbers it seems that the China model covers all the numbers as the Europe mode,l plus a few more. If so, then what bands are missing?
Or doesn't it work that way? Please help me understand
Edit: Oh... I missed to see band 20. But what does it mean practically that the China model misses band 20? How will I notice it?

vladimir_carlan said:
The only LTE band that is missing on A3010 is Band20. Most of Sweden network carriers are using Band7 so you are good to go. When you go aboard is a different story. But you are also more flexible because you can chose the roaming network. All you have to do is to chose a supported network carrier.
Click to expand...
Click to collapse
Okay. What does it mean practically that the China model misses band 20?
How would I be likely to notice it when using my phone?

white-k said:
Okay. What does it mean practically that the China model misses band 20?
How would I be likely to notice it when using my phone?
Click to expand...
Click to collapse
On a network that is using Band20 you'll have only HSDPA connectivity. Basically the phone will work just fine except the fact you won't have LTE connectivity. You'd have only 2G/3G/H+

vladimir_carlan said:
On a network that is using Band20 you'll have only HSDPA connectivity. Basically the phone will work just fine except the fact you won't have LTE connectivity. You'd have only 2G/3G/H+
Click to expand...
Click to collapse
Thank you. It's getting somewhat clearer. Okay, but how likely am I to run in to Band20? Is that band (the only one missing from China model) more likely to be used than any of all of the other bands that are listed?

white-k said:
Thank you. It's getting somewhat clearer. Okay, but how likely am I to run in to Band20? Is that band (the only one missing from China model) more likely to be used than any of all of the other bands that are listed?
Click to expand...
Click to collapse
I'll give you the UK example. In UK there's 3 LTE bands in use: 3,7 and 20. Other put 2600Mhz, 1800Mhz and 800Mhz (that's Band20 btw...). Only O2 is using only Band 20. All other providers are using at least one extra LTE band. EE is using all three LTE bands, Vodafone is using band 3 and band 20 and Three is using band 7 and band 20.
Now here is the thing... Those network checkers are telling that your device might work. But is not always the case. Here is the Vodafone UK example. As I said they are using Band 3 and Band 20. Now let's take a phone with Band3 but not Band 20 (for example my former Xiaomi Mi5). Will work on LTE but only in urban areas. Why? Because in rural areas the band used are band 7 and 20. Why? Lower frequencies are better at travelling long distances so are more suitable for rural areas where there are fewer masts. Also Band 20 provide better indoor coverage. But if you live in an urban area Band 3 and 7 are more likely to be used. The higher the frequency means higher capacity and therefore the ability to deal with more users which is a must in an urban area.
All in all the best way is to call your provider and ask what frequency they are using in YOUR area. If they are using 1800Mhz or 2600Mhz you are good to go. If not...I'm sorry.
---------- Post added at 12:15 AM ---------- Previous post was at 12:07 AM ----------
Just for my curiosity why are interested on a China version and not on a Europe one?

Here is the list of LTE bands used by Sweden network carriers. Take a look at it and you'll see if China version is good to go on your provider.

If you're primarily going to use it in Sweden, I would go with the A3003 (that's what I did, but then I seldom leave Jämtland ?).

vladimir_carlan said:
I'll give you the UK example. In UK there's 3 LTE bands in use: 3,7 and 20. Other put 2600Mhz, 1800Mhz and 800Mhz (that's Band20 btw...). Only O2 is using only Band 20. All other providers are using at least one extra LTE band. EE is using all three LTE bands, Vodafone is using band 3 and band 20 and Three is using band 7 and band 20.
Now here is the thing... Those network checkers are telling that your device might work. But is not always the case. Here is the Vodafone UK example. As I said they are using Band 3 and Band 20. Now let's take a phone with Band3 but not Band 20 (for example my former Xiaomi Mi5). Will work on LTE but only in urban areas. Why? Because in rural areas the band used are band 7 and 20. Why? Lower frequencies are better at travelling long distances so are more suitable for rural areas where there are fewer masts. Also Band 20 provide better indoor coverage. But if you live in an urban area Band 3 and 7 are more likely to be used. The higher the frequency means higher capacity and therefore the ability to deal with more users which is a must in an urban area.
All in all the best way is to call your provider and ask what frequency they are using in YOUR area. If they are using 1800Mhz or 2600Mhz you are good to go. If not...I'm sorry.
---------- Post added at 12:15 AM ---------- Previous post was at 12:07 AM ----------
Just for my curiosity why are interested on a China version and not on a Europe one?
Click to expand...
Click to collapse
Wow. Now that was a good response! You really seem to know your stuff! Cool. :good:
Okay. Now I understand things a lot better too.
I use Telenor (and spend quite some time in Jämtland (rural) like another poster here:good.
Well I plan to buy my phone on ebay and the annoying thing is that the A3003 is about $100 more expensive than the A3010. I still think it is hard to decide if it will be worth an extra $100 for the Europe version...

You should not only consider LTE Bands, but also consider LTE CA.
Hong Kong/ Europe Model (A3003)
FDD-LTE/ 4G: Bands 1/3/5/7/8/20
TDD-LTE/ 4G: Bands 38/40
LTE CA / 4G+:
B3+B7, B3+B8, B3+B20, B7+B20, B3+B3, B3C, B7+B7, B7C, B40C
China Model (A3010)
FDD-LTE/ 4G : Bands 1/3/5/7/8
TDD-LTE/ 4G: Bands 38/39/40/41
LTE CA/ 4G+:
B1+B3, B39+B41, B39C, B40C, B41+B41, B41C，B38C
American Model (A3000)
FDD-LTE: Bands 1/2/4/5/7/8/12/17/30
LTE CA/ 4G+:
B2+B12, B2+B17, B4+B7, B4+B17, B12+B30,B2+B2, B2C, B4+B4, B4+B12, B4+B5, B2+B5

Ok. I ended up buying the EU-version as I found one that was just $40 more expensive.
Many thanks for making this more understandable guys! *thumbs up*

Does band 66 is really supported on P30 Pro VOG-L04?

Need help figuring this one out. I just got last week while visiting Illinois a P30 Pro L04 that is from Telcel Mexico. Got it from a coworker that lives in Mexico. It is unlocked and I am using in T-mobile ever since. I live in Puerto Rico where Tmobile has Band 4-66-71 for LTE. My previous phone is an Note 9 that I love and still think is better in some ways that the P30 specially in the software side. The cameras in the P30 are spectacular and step way above the Note 9. Long story short my P30 won't connect to band 66, only band 4. It is supposedly supported but it doesn't connect to it. I put my sim card back in the Note 9 and it does connect to band 66 as it used to. So it is definitively the P30 Pro problem. Does anyone know a way to verify what Bands are supported on the phone and see if it Telcel that blocked the band 66. Or maybe the P30 does NOT support band 66 as claimed? Does anyone has a L04 and can connect to band 66? I am new to Huawei phones and don't know what tool are available to verify this things.

I think you might be seeing 66 on your note, but it still really 4. (4 is a sub frequency of 66)
The 66 you're referring to will specify AWS-3. An app like network cell info on the play store should specify - though will likely only work on the Note assuming it's the snapdragon variant.

Goronok said:
I think you might be seeing 66 on your note, but it still really 4. (4 is a sub frequency of 66)
The 66 you're referring to will specify AWS-3. An app like network cell info on the play store should specify - though will likely only work on the Note assuming it's the snapdragon variant.
Click to expand...
Click to collapse
Do you care to elaborate a little more so I can fully understand. Yes my note 9 is the snapdragon variant from Tmobile. I am using the Network Cell Info Lite App and it does show connections to LTE bands 2, 4, 66 and 71 on the note. depending on the place I am around my apt or outside. The P30 Pro only show connections to LTE bands 2 and 4 connections. I understand that bands 66 and 4 are related as they are the same frequencies , but still band 66 should give me better speeds and better connection as shall be not as congested., more blocks, etc. The Network Cell Info (at least the lite version) does not give me anything about the AWS of the band.
So my questions for you or anyone else are:
Are you saying that band 66 won't show on the P30 Pro even if it is connected to it?
Do you know of an engineering menu to really verify that the phone support band 66?
One of my main interest and one that may help a lot of people is to establish if the phone really support band 66 as claimed for this variant?
and if it does, does Telcel disable that support?
if they did, maybe with a generic firmware modem we can get it back?
Thanks in advance

ellopr said:
Do you care to elaborate a little more so I can fully understand. Yes my note 9 is the snapdragon variant from Tmobile. I am using the Network Cell Info Lite App and it does show connections to LTE bands 2, 4, 66 and 71 on the note. depending on the place I am around my apt or outside. The P30 Pro only show connections to LTE bands 2 and 4 connections. I understand that bands 66 and 4 are related as they are the same frequencies , but still band 66 should give me better speeds and better connection as shall be not as congested., more blocks, etc. The Network Cell Info (at least the lite version) does not give me anything about the AWS of the band.
So my questions for you or anyone else are:
Are you saying that band 66 won't show on the P30 Pro even if it is connected to it?
Do you know of an engineering menu to really verify that the phone support band 66?
One of my main interest and one that may help a lot of people is to establish if the phone really support band 66 as claimed for this variant?
and if it does, does Telcel disable that support?
if they did, maybe with a generic firmware modem we can get it back?
Thanks in advance
Click to expand...
Click to collapse
I do not currently have a P30 Pro, so can't speak definitively. (Sold my L29 and have an L04 on the way) I asked about the snapdragon variant because these devices are generally the only that will properly break out band information for you to look at.
The answer to your question is a bit convoluted due to the fact that band 66 includes band 4. These are the AWS bands - band 2 is PCS, 3 DCS, etc. Some devices may tell you that you're connected to 66, but you are in fact connected to 4. (see here for a better definition: https://www.phonescoop.com/glossary/term.php?gid=570 ) If you look closely here, you will see that band 4 and 66 include the same frequencies, but 4 is specific to blocks A-F and 66 includes blocks A-J. Say, you're connected to block C, your phone could be telling you that you're connected to 4 or 66 - both would be correct, its just how the manufacturer has told the software to relay this information.
What you're wanting to validate is that you're connected to the "new/faster" part of band 66, which will be displayed as AWS3 for AT&T. On the RAW tab within network cell information (on your note) it should have the band info and then corresponding block information. If your Note is reading 66 (AWS13) this will probably show as band 4 on your P30 Pro, as it is technically .. band 4. If you are seeing 66 (AWS3) this means you are genuinely connected to the part of 66 you're after. If you see this on your Note and your P30 Pro is still showing band 4, I would suspect that your theory regarding P30 Pro band 66 support is correct. (aka.. not functioning)
Hope this helps.

Goronok said:
I do not currently have a P30 Pro, so can't speak definitively. (Sold my L29 and have an L04 on the way) I asked about the snapdragon variant because these devices are generally the only that will properly break out band information for you to look at.
The answer to your question is a bit convoluted due to the fact that band 66 includes band 4. These are the AWS bands - band 2 is PCS, 3 DCS, etc. Some devices may tell you that you're connected to 66, but you are in fact connected to 4. (see here for a better definition: https://www.phonescoop.com/glossary/term.php?gid=570 ) If you look closely here, you will see that band 4 and 66 include the same frequencies, but 4 is specific to blocks A-F and 66 includes blocks A-J. Say, you're connected to block C, your phone could be telling you that you're connected to 4 or 66 - both would be correct, its just how the manufacturer has told the software to relay this information.
What you're wanting to validate is that you're connected to the "new/faster" part of band 66, which will be displayed as AWS3 for AT&T. On the RAW tab within network cell information (on your note) it should have the band info and then corresponding block information. If your Note is reading 66 (AWS13) this will probably show as band 4 on your P30 Pro, as it is technically .. band 4. If you are seeing 66 (AWS3) this means you are genuinely connected to the part of 66 you're after. If you see this on your Note and your P30 Pro is still showing band 4, I would suspect that your theory regarding P30 Pro band 66 support is correct. (aka.. not functioning)
Hope this helps.
Click to expand...
Click to collapse
Yes it helps a ton. I had to buy the full version of the Network Cell info to get the AWS information, not showing the Lite version.
The note 9 is reading band 66 (AWS13) in Tmobile. With the same simcard and location the P30 reads Band 4(AWS1). So I can't really say if the P30 Pro it is not connecting to band 66. I guess will be good if you give me a follow up once you get your P30 Pro L04 and you happen to be in an area with "real" band 66 support.
Thanks because I am sure this info is good for those that has this variant, or those that want to get one especially if its going to factor into their decision.

ellopr said:
Yes it helps a ton. I had to buy the full version of the Network Cell info to get the AWS information, not showing the Lite version.
The note 9 is reading band 66 (AWS13) in Tmobile. With the same simcard and location the P30 reads Band 4(AWS1). So I can't really say if the P30 Pro it is not connecting to band 66. I guess will be good if you give me a follow up once you get your P30 Pro L04 and you happen to be in an area with "real" band 66 support.
Thanks because I am sure this info is good for those that has this variant, or those that want to get one especially if its going to factor into their decision.
Click to expand...
Click to collapse
For sure. I also bought the L04 variant for B66, so I'm hopeful that this band is indeed active. I will let you know what I find out.
Let me know if you run across AWS3 to validate too.

I've had my L04 P30 pro all over Chicago and St Louis the past few days (in areas I know have b66 coverage) and have yet to see the device pickup it up once.
My only thoughts are that the device only activates b66 once properly provisioned by Telus on their networks, or that AT&T will only tell certain devices to grab the band that they know have proper hardware for. (Internal database of devices, etc) I'm genuinely curious if any Tmobile people are able to pickup the band; generally Tmobile is more lax about these requirements.
Either way, b66 isn't supported on AT&T on my particular L04.

Goronok said:
I've had my L04 P30 pro all over Chicago and St Louis the past few days (in areas I know have b66 coverage) and have yet to see the device pickup it up once.
My only thoughts are that the device only activates b66 once properly provisioned by Telus on their networks, or that AT&T will only tell certain devices to grab the band that they know have proper hardware for. (Internal database of devices, etc) I'm genuinely curious if any Tmobile people are able to pickup the band; generally Tmobile is more lax about these requirements.
Either way, b66 isn't supported on AT&T on my particular L04.
Click to expand...
Click to collapse
At least in different place in Puerto Rico it is the same, only band 4. I shall be in Chicago area also probably in like a month and in Mexico. Will take my note 9 with me to make sure I am in AWS 3 to see if I get band 66. if not then something is right with the phones having band 66 blocked.
Thanks for the update

Unlock LTE Bands on K20 Pro China version

Hello friends, it's been a while since someone posed the question below. I just bought a K20 Pro (China Version) from Aliexpress and only found out about the limitations of LTE bands. I was wondering if there is now a workaround to add LTE bands with a newer version QPST or another workaround/hack? If that, could we expect something in the future or am I pretty much toast?

You are toast. Time to buy a phone that's got all the bands you need. I'm in the same spot I need to give up on these POS international phone with almost 0 LTE bands for the USA.

954wrecker said:
You are toast. Time to buy a phone that's got all the bands you need. I'm in the same spot I need to give up on these POS international phone with almost 0 LTE bands for the USA.
Click to expand...
Click to collapse
I hope at some point there will be a hack, like there has been in the past. where are the geniuses on this forum ?

It's not about geniusness, it's utterly time wasting and requires a hell lot of effort which in the end doesn't guarantee it will unlock the bands, so next time get a phone with your required bands.
Sent from my Redmi K20 Pro using Tapatalk

asfazrq said:
Hello friends, it's been a while since someone posed the question below. I just bought a K20 Pro (China Version) from Aliexpress and only found out about the limitations of LTE bands. I was wondering if there is now a workaround to add LTE bands with a newer version QPST or another workaround/hack? If that, could we expect something in the future or am I pretty much toast?
Click to expand...
Click to collapse
I seen people talking about how to do it on LO17 thread

SuperShad98 said:
I seen people talking about how to do it on LO17 thread
Click to expand...
Click to collapse
Didn't find any mention of adding LTE bands in the LOS thread. Can you point me in the right direction with a post number or page number?

I'm referring to the comments around the end of the first page on this thread (also continues to page 2)
https://forum.xda-developers.com/k20-pro/development/rom-lineageos-17-0-t3976469
I also found this, which seems pretty much what we need
https://forum.xda-developers.com/android/apps-games/app-qualcomm-nv-calculator-adding-2g-3g-t2915649

**** these international phones I'm tired of them not having the bands we use in the USA activated. My mix 3 had every single LTE band and this K20 pro has 1 ****ty band. Why can't every phone have every band that people use in the world, is it really that hard?

954wrecker said:
**** these international phones I'm tired of them not having the bands we use in the USA activated. My mix 3 had every single LTE band and this K20 pro has 1 ****ty band. Why can't every phone have every band that people use in the world, is it really that hard?
Click to expand...
Click to collapse
If you look at the OnePlus 7 Pro bands you can see that it's easy, but brands don't want to do that for profits of selling a new phone when someone moves to a different country and so on, however I am not too sure why xiaomi doesn't have all bands enabled on the global version of the phone like OnePlus, I would understand locking the CN and Indian version, but the global should have all bands enabled

Engineer code qualcomm 855
Unfortunately, even if I've bought a MI9 T pro , described with correct bands & charger (need 4G B20 & B28) ; they send me a Redmi K20 pro with chinese plug... I opened a dispute but it drags on and I'm afraid of not having a commercial solution. So If someone did find a technical one ; I'd be very glad !
I saw some old techniques on Youtube, none of them works ; nor engineering codes (#*#*...) Is there a way to know them ? Thank you !

Good luck, but it's almost improbable, Even Pocophone failed.
Sent from my Redmi K20 Pro using Tapatalk

network signal guru which is available in play store with that can change bands of LTE but root access is must

leothomas2580 said:
network signal guru which is available in play store with that can change bands of LTE but root access is must
Click to expand...
Click to collapse
It won't work, if it was that easy it would be miracles, have you tried?
Sent from my Redmi K20 Pro using Tapatalk

ishaqtkr said:
It won't work, if it was that easy it would be miracles, have you tried?
Click to expand...
Click to collapse
Right now I'm using custom rom(evolution x) on my Redmi k20 pro/mi9 t pro didn't tried on Chinese rom
but the bands works using network signal guru

leothomas2580 said:
Right now I'm using custom rom(evolution x) on my Redmi k20 pro/mi9 t pro didn't tried on Chinese rom
but the bands works using network signal guru
Click to expand...
Click to collapse
This from the Network Signal Guru FAQs
Can you changed the band capacities of my cell phone. My cell phones are from other countries and the band capabilities are not so good, and I want more band support. Could NSG do that?
NSG cannot provide this kind of feature and we don't change the band capabilities. It's different among different phones, so it's dangerous and once failed, you will lose all of the band capabilities of certain radio technology. And it's very difficult to recover.
So, no it's not possible to unlock the bands.

Robbo.5000 said:
This from the Network Signal Guru FAQs
Can you changed the band capacities of my cell phone. My cell phones are from other countries and the band capabilities are not so good, and I want more band support. Could NSG do that?
NSG cannot provide this kind of feature and we don't change the band capabilities. It's different among different phones, so it's dangerous and once failed, you will lose all of the band capabilities of certain radio technology. And it's very difficult to recover.
So, no it's not possible to unlock the bands.
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I knew it, if it was as easy as using an app everyone would import phones from China and modify lol
Sent from my Redmi K20 Pro using Tapatalk

ishaqtkr said:
I knew it, if it was as easy as using an app everyone would import phones from China and modify lol
Click to expand...
Click to collapse
Okay thank you

It's likely the bands are "hardware locked".
So depending on the region of the device various bands will be enabled or disabled. Every region of the device might well have the same modem - and that modem might support all the bands you want - but they won't work and there'll be no way of getting them to work as it'll be on a hardware-level.
It's why when you flash a Global ROM to a Chinese handset bands don't appear and vice versa. Both region ROMs will have their respective modern firmware but that doesn't change what bands you get - which would imply its literally hard-coded into the modem itself.
What I've read on the pocophone implies the band programming is locked, read-only, unmodifiable.

every site i check says mi phone can use lte in my country but i cant connect to it on my phone .... what do i do??

Question Mi 11 ultra network bandwidth limit / low Download speeds

Hello Xiaomi community, I am using my Mi 11 ultra(Chinese - yet to flash EU rom) on T-mobile in US. I have a oneplus 8T as well which is connected to the same network. When I test these two mobiles, which are connected to HSDPA right next to each other, I get 40mbps download speeds on Oneplus 8t but only 10mbps on mi 11 ultra. Is mi 11 ultra or MiUi limiting the network bandwidth? Are there any settings that I can adjust to see the same speeds? Both seem to be connected on Band 2. Appreciate any help with this. @olkitu, please comment.

lalith said:
Hello Xiaomi community, I am using my Mi 11 ultra(Chinese - yet to flash EU rom) on T-mobile in US. I have a oneplus 8T as well which is connected to the same network. When I test these two mobiles, which are connected to HSDPA right next to each other, I get 40mbps download speeds on Oneplus 8t but only 10mbps on mi 11 ultra. Is mi 11 ultra or MiUi limiting the network bandwidth? Are there any settings that I can adjust to see the same speeds? Both seem to be connected on Band 2. Appreciate any help with this. @olkitu, please comment.
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*#*#4636#*#*

avetny said:
*#*#4636#*#*
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Thank you for the info @avetny . I have checked both the mobiles and here is what I see. Oneplus 8t mostly connected to LTE, and Mi 11 ultra switching between EDGE, HSPA and if I force the setting to NR/LTE only, it shows LTE but can't browse anything and no data connection at all. Am I missing something? Also am sitting right next to the TMobile 4g LTE personal cell booster box with both these mobiles
This is when mi 11 on EDGE n/w
This is when mi 11 on LTE (with 20mbps download speed)
This is oneplus 8t mostly connected to LTE with 60 to 100mbps download speeds

Restart device

When I get into that menu and I change the network type the setting doesn't stick,why?

avetny said:
Restart device
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Tried with various settings few times. Am not sure why the connection stability is low and always switching from EDGE to HSPA to LTE where as oneplus rarely shows me HSDPA. I have a 4G LTE T mobile cell spot sitting right next to me.
In terms of the modem Mi 11 ultra has X60 where as oneplus 8t has X55

Check again settings.
Make sure 5G is preferred.
Make sure 5G Smart Switch is off.
This make help too: 5G battery saver is off.

lalith said:
Hello Xiaomi community, I am using my Mi 11 ultra(Chinese - yet to flash EU rom) on T-mobile in US. I have a oneplus 8T as well which is connected to the same network. When I test these two mobiles, which are connected to HSDPA right next to each other, I get 40mbps download speeds on Oneplus 8t but only 10mbps on mi 11 ultra. Is mi 11 ultra or MiUi limiting the network bandwidth? Are there any settings that I can adjust to see the same speeds? Both seem to be connected on Band 2. Appreciate any help with this. @olkitu, please comment.
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Click to collapse
Well Xiaomi do not support Carrier Aggregation combinations and 5G used in US. Maybe SA only n41 could work but it's by default disabled outside from China.
OnePlus 8T is US model? You should buy device from your own region to avoid issues. As you know you can check on https://cacombos.com website supported bands and carrier aggregation combinations of devices. Make sure it support Carrier Aggregation combinations your carrier use on your area.

olkitu said:
Well Xiaomi do not support Carrier Aggregation combinations and 5G used in US. Maybe SA only n41 could work but it's by default disabled outside from China.
OnePlus 8T is US model? You should buy device from your own region to avoid issues. As you know you can check on https://cacombos.com website supported bands and carrier aggregation combinations of devices. Make sure it support Carrier Aggregation combinations your carrier use on your area.
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Thank you for the response, would flashing a Global ROM gets me all the Band combos? I understand changing the ROM is not going to get me the missing Band 66 from Chinese version phone, but atleast wondering if I flash, the combos listed on Global version would follow? or ROM flashing will not change any Combos? Thank you.

lalith said:
Thank you for the response, would flashing a Global ROM gets me all the Band combos? I understand changing the ROM is not going to get me the missing Band 66 from Chinese version phone, but atleast wondering if I flash, the combos listed on Global version would follow? or ROM flashing will not change any Combos? Thank you.
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Try the global or Eu ROM
The China one is full of headaches outside china

speedtripler said:
Try the global or Eu ROM
The China one is full of headaches outside china
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Am trying NetMonster to see which cell tower and band(s) its connecting and if its using any combo bands. Typically the combo shows up like - (4G. LTE 1900+ AWS-A). I have not seen a combo so far on this with the Chinese ROM, but not sure if Global/EU ROM makes any difference. Unless the Global/EU ROM deals with Band Combos. Am yet to boot unlock, so could not do a quick try.
Were you able to get better speeds or use NetMonster to see Combo bands with Non Chinese ROM?

lalith said:
Am trying NetMonster to see which cell tower and band(s) its connecting and if its using any combo bands. Typically the combo shows up like - (4G. LTE 1900+ AWS-A). I have not seen a combo so far on this with the Chinese ROM, but not sure if Global/EU ROM makes any difference. Unless the Global/EU ROM deals with Band Combos. Am yet to boot unlock, so could not do a quick try.
Were you able to get better speeds or use NetMonster to see Combo bands with Non Chinese ROM?
Click to expand...
Click to collapse
I had great speeds on every ROM but In my city they only use band 78 for 5G and I get about 250-300mb even without line of sight of the antenna, even I'm a restaurant or a mall it's that fast
i haven't been able to spot a 5G tower yet so I can test one in direct line of sight of it but I've read you can get about 700mb/s

speedtripler said:
I had great speeds on every ROM but In my city they only use band 78 for 5G and I get about 250-300mb even without line of sight of the antenna, even I'm a restaurant or a mall it's that fast
i haven't been able to spot a 5G tower yet so I can test one in direct line of sight of it but I've read you can get about 700mb/s
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Wow, that's crazy speed. Never heard of those kind of speeds in US. I wish the phone manufacturers just let the users decide what bands they want to enable in their region if the phone is high-end latest and greatest

Not always but here in london at my place i get 500+Mbps