G977N and 5G not working - Samsung Galaxy S10 5G Questions & Answers

I bought an S10 5G korean version 977N KT branded, my carrier is Vodafone Italy and everything works fine, apart the 5G connection, never seen on the display. Does anybody have the same issue using the korean device abroad?

Korean S10 5G only enables 5GNR Band 78 when certain operator (ie: Korean) SIM cards are inserted. Otherwise inside the UeCapabilityInformation it sends, it only includes LTE Bands (1, 3, 7, 8, 20, 32, 39, 40).

rjlawson said:
Korean S10 5G only enables 5GNR Band 78 when certain operator (ie: Korean) SIM cards are inserted. Otherwise inside the UeCapabilityInformation it sends, it only includes LTE Bands (1, 3, 7, 8, 20, 32, 39, 40).
Click to expand...
Click to collapse
Could a proper firmware or a custom rom solve the problem?

I think it's something in either the CSC or the baseband, but not sure.

rjlawson said:
Korean S10 5G only enables 5GNR Band 78 when certain operator (ie: Korean) SIM cards are inserted. Otherwise inside the UeCapabilityInformation it sends, it only includes LTE Bands (1, 3, 7, 8, 20, 32, 39, 40).
Click to expand...
Click to collapse
You mean this?
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Yes exactly!

any news?

secany said:
any news?
Click to expand...
Click to collapse
Yes, I bought a 977B and now I have the 5G
Inviato dal mio SM-G977B utilizzando Tapatalk

Waterskier said:
Yes, I bought a 977B and now I have the 5G
Inviato dal mio SM-G977B utilizzando Tapatalk
Click to expand...
Click to collapse
lmao =))))))

Id love to know if anyone has a fix for this.

October update is now showing the 5G option on mine.

rjlawson said:
October update is now showing the 5G option on mine.
Click to expand...
Click to collapse
I had it since i purchased the phone, changed CSC from LUC to KOO but 5g still doesn't work, it turns on for a 2 sec. And then switches back to LTE

Folks,
Any news/updates on this issue? Is there still any hope to fix the 5G reception by this model?
Will the new update to Android 10 help overcome this constraint?
Thanks,

nawaf2816 said:
Folks,
Any news/updates on this issue? Is there still any hope to fix the 5G reception by this model?
Will the new update to Android 10 help overcome this constraint?
Thanks,
Click to expand...
Click to collapse
For shure there is.. I changed my phone for a 977B. Now I have the 5G

Waterskier said:
For shure there is.. I changed my phone for a 977B. Now I have the 5G
Click to expand...
Click to collapse
Really?? that brilliant :silly:
If the problem is not HW. related, there shall be a resolution either soon or later! I wish it is not H.W limitation!
Let's hear from others who still keep on using this model ....
BTW: the two models (B/N) are exactly similar in HW specs. if not identical. If am not worng ?, furthermore, the custom ROM (VN-ROM) here is working on both similarly and as per developer, it is based on G977B firmware!

nawaf2816 said:
Really?? that brilliant :silly:
If the problem is not HW. related, there shall be a resolution either soon or later! I wish it is not H.W limitation!
Let's hear from others who still keep on using this model ....
Click to expand...
Click to collapse
I heard from a guru that 5G connection is a SIM related process, so to enable it you have to insert the branded SIM

Waterskier said:
I heard from a guru that 5G connection is a SIM related process, so to enable it you have to insert the branded SIM
Click to expand...
Click to collapse
So why the phone is unlocked initially and globally sold! while it requires specific carrier sim!. and all services are working great except 5G modem is not active !!

nawaf2816 said:
So why the phone is unlocked initially and globally sold! while it requires specific carrier sim!. and all services are working great except 5G modem is not active !!
Click to expand...
Click to collapse
I had the same problem with a KT branded one. It is unlocked for all the networks except the 5G, that is evidently considered an optional function, that is only enabled using that carrier sim

nawaf2816 said:
So why the phone is unlocked initially and globally sold! while it requires specific carrier sim!. and all services are working great except 5G modem is not active !!
Click to expand...
Click to collapse
I had the same problem with a KT branded one. It is unlocked for all the networks except the 5G, that is evidently considered an optional function, that is only enabled using that carrier sim. No way to fix this through software

Waterskier said:
I had the same problem with a KT branded one. It is unlocked for all the networks except the 5G, that is evidently considered an optional function, that is only enabled using that carrier sim
Click to expand...
Click to collapse
Yes right, I do have this model. but do you expect 5G is optional for this device manufactured to support the 5G network!, logically no!!
It is an essential feature that should be available as the other features!
This makes me think that the model is not fully supporting worldwide 5G networks bands and it might be equipped with a certain 5g-modem that supports KT 5g-NR bands ONLY!! . in addition, the low price for the N model also supports this assumption!
---------- Post added at 01:35 PM ---------- Previous post was at 01:30 PM ----------
BTW Mr. Waterskier, How much the difference in price for the two models since you had got both of them?

Related

P9 4G+ : inter or intra band ?

Hi,
For 4G+ Intra or inter-bands ? Someone have an answer for this question ?
Some devices, like Honor 7, are given for having 4G+. BUT only with intra-band system.
And in some countries, like France, 4G+ impossible with an intra-band system, only with inter-bands.
Therefore, you buy a supposed 4G+ device, and you always stay on 4G .
That's why an accurate answer about this question is important.
Thank you very much!
However there are also some LTE band differences between the 3 versions:
- Global 4/64 dual SIM
- Global 3/32 dual SIM
- Global 3/32 single SIM
and maybe Chinese versions are even different.
http://consumer.huawei.com/en/mobile-phones/p9
A similar problem about 4G and 4G+ in France was discussed on XDA about the Huawei Mate 8.
Thank you.
I was talking in fact for the EVA-L09 sold in France and Europe. Single sim 32Go.
And yes, I was also thinking about the similar problem on Mate 8. It's true.
It should be better if Huawei communicates more accuratly about this.
About the Mate 8, I can say that my Mate 8 (international European L29 version unbranded) never showed "4G+" in Italy (I even doubt the 4G+ symbol is included in its ROM...), whilst my new Samsung S7 Edge always shows 4G+ in the same locations...
Exact. That's why I'm in doubt about Huawei devices now...
Up
Someone got working 4G+ with european version?
I would be intrested too.
EDIT: Never seen 4g+ symbol...
As i didnt know about this problem and one of the main reasons i bought this phone was 4g+. So finding this out kinda angers me. I already contacted huawei regarding this lets see what they have to say about it.
I get 4G+ on my P9 when an EE SIM is on it (UK), so that will be 1800+2600 LTE.
First Huawei/Honor device that I've had that shows the + bit (P8, Honor 5X, Honor 7, Nexus 6P all don't).
jonmorris said:
I get 4G+ on my P9 when an EE SIM is on it (UK), so that will be 1800+2600 LTE.
First Huawei/Honor device that I've had that shows the + bit (P8, Honor 5X, Honor 7, Nexus 6P all don't).
Click to expand...
Click to collapse
I have vodafone ITA and 4g+ should also be 1800+2600, but i have never seen the + icon. I have a eva-l19, what model do you have?
EVA-L09
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jonmorris said:
EVA-L09
...
Click to expand...
Click to collapse
As my p9 is the eva-l19, which has less bands for LTE, i will still wait for huawei's answer. I have a feeling my p9 doesnt have proper carrier aggregation...
jonmorris said:
I get 4G+ on my P9 when an EE SIM
Click to expand...
Click to collapse
EE can use intra-band system as well.
jonmorris said:
First Huawei/Honor device that I've had that shows the + bit (P8, Honor 5X, Honor 7, Nexus 6P all don't).
Click to expand...
Click to collapse
6P do not indicate 4G+ mode always showing LTE but aggregation working fine.
noki57oo said:
As my p9 is the eva-l19, which has less bands for LTE, i will still wait for huawei's answer. I have a feeling my p9 doesnt have proper carrier aggregation...
Click to expand...
Click to collapse
I also have p9 l19, but I'm quite certain I saw 4g+, before I updated it (I just yesterday bought it) and now all I see is 4g. My carrier supports those bands
Kahoots said:
I also have p9 l19, but I'm quite certain I saw 4g+, before I updated it (I just yesterday bought it) and now all I see is 4g. My carrier supports those bands
Click to expand...
Click to collapse
That's good to hear. Im now keeping a close eye on that icon to see if it magically appears...
On another note, Huawei still hasnt answered me, starting to feel like i wont get an answer...
EDIT: I contacted Huawei on social media too, lets see what happens, i want an answer!
I can confirmed about the 4G+ icon
Sent from my EVA-L09 using XDA-Developers mobile app
ilos said:
I can confirmed about the 4G+ icon
so l09 has 4g+, but what about l19 ? lte specs are the same, just the bands differ
Click to expand...
Click to collapse
Kahoots said:
ilos said:
I can confirmed about the 4G+ icon
Click to expand...
Click to collapse
so l09 has 4g+, but what about l19 ? lte specs are the same, just the bands differ
Click to expand...
Click to collapse
Yeah, Huawei answered me on social media, and they just told me what 4G frequencies the phone has. Support still hasn't answered me, which i guess means they won't answer.
I haven't seen the 4G+ icon once...
noki57oo said:
Yeah, Huawei answered me on social media, and they just told me what 4G frequencies the phone has. Support still hasn't answered me, which i guess means they won't answer.
I haven't seen the 4G+ icon once...
Click to expand...
Click to collapse
but by all logic it has to work if the frequencies match right ? since my carrier uses most of the l19's frequencies yet nothing, but I still somehow hope that it is just a software glitch, because as I mentioned before, that I believe, that I saw 4g+ icon when I unboxed the phone, but when I updated it , it was gone, although I'm not complaining about the speeds since my top speedtest was 75mbps down and variating 25-75mbps, while up 7-22
So Huawei actually answered, they say that they do not have access to this information, which feels strange. They sent me a lot of data regarding the bands, like frequencies, signal strength, downlink and uplink on different bands, but no carrier aggregation bands....
Hello,
P9 lite (VNS-L31) B130 firmware. No 4G+ icon

Exynos variant

Can anyone confirm the compatibility of the Exynos variant with T-mobile? Frequency check websites show 100% compatibility but looking for personal experience feedback. Also curious if B66 works as intended in the US.
TehPirate_ said:
Can anyone confirm the compatibility of the Exynos variant with T-mobile? Frequency check websites show 100% compatibility but looking for personal experience feedback. Also curious if B66 works as intended in the US.
Click to expand...
Click to collapse
Its good. I use the S7 Exynos on T-Mobile. Its perfectly fine but with no wifi calling and a bit worse service.
mweinbach said:
Its good. I use the S7 Exynos on T-Mobile. Its perfectly fine but with no wifi calling and a bit worse service.
Click to expand...
Click to collapse
Service is already hit or miss where I live now. Can you elaborate on how the service is worse? Band support or signal strength?
TehPirate_ said:
Service is already hit or miss where I live now. Can you elaborate on how the service is worse? Band support or signal strength?
Click to expand...
Click to collapse
I just noticed that the service is like just a little worse, you most likely wont notice a difference.
Anyone play around with the idea of loading the T-mobile S8 firmware onto the Exynos international version of the phone to see if that would be enough to get Wifi calling working? Wifi calling is essential to me since I work in a building with great wifi but no service.
JGoldz75 said:
Anyone play around with the idea of loading the T-mobile S8 firmware onto the Exynos international version of the phone to see if that would be enough to get Wifi calling working? Wifi calling is essential to me since I work in a building with great wifi but no service.
Click to expand...
Click to collapse
You cannot install Snapdragon firmware on an Exynos based phone. This will lead to a brick. The only thing from a Snapdragon firmware you can install I believe is CSC but don't quote me on that.
TehPirate_ said:
You cannot install Snapdragon firmware on an Exynos based phone. This will lead to a brick. The only thing from a Snapdragon firmware you can install I believe is CSC but don't quote me on that.
Click to expand...
Click to collapse
I was also wondering if flashing the tmobile CSC to the 955F would enable wifi calling. The only LTE band that the Exynos variant doesn't have that T-mobile uses is 66 and from what I've been able to research that's not sued int he NYC area. But wifi calling is critical. I use it a lot to call back home when I travel abroad.
EastVillage said:
I was also wondering if flashing the tmobile CSC to the 955F would enable wifi calling. The only LTE band that the Exynos variant doesn't have that T-mobile uses is 66 and from what I've been able to research that's not sued int he NYC area. But wifi calling is critical. I use it a lot to call back home when I travel abroad.
Click to expand...
Click to collapse
That is incorrect. The 950F does support band 66. I took this from service mode on my 950F
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I can't imagine 955F would be different from 950F
I received my phone yesterday. After a couple sites reporting it did support band 66, I dove in and was not disappointed.
TehPirate_ said:
That is incorrect. The 950F does support band 66. I took this from service mode on my 950F
I can't imagine 955F would be different from 950F
I received my phone yesterday. After a couple sites reporting it did support band 66, I dove in and was not disappointed.
Click to expand...
Click to collapse
Thanks but there's something weird about your screenshot. Band 32 is out of order and is not used on any Samsung phone. I think that should be 42. I find it hard to believe that there is a typo in the service menu.
I was using frequencycheck.com and willmydevicework.com as my sources. I agree that on this point I'm positive that the 950 and 955 should be the same.
EastVillage said:
Thanks but there's something weird about your screenshot. Band 32 is out of order and is not used on any Samsung phone. I think that should be 42. I find it hard to believe that there is a typo in the service menu.
I was using frequencycheck.com and willmydevicework.com as my sources. I agree that on this point I'm positive that the 950 and 955 should be the same.
Click to expand...
Click to collapse
Yeah it's strange and I do think it's a typo. But that's what service mode shows, regardless of which SIM I select.
With the exynos you'll also lose VoLTE. Meaning in areas where T-Mobile is using B12 LTE to extend the range of its network (B12 LTE 700mhz goes further than their EDGE and HSPA network (1700,1900,2100mhz) so if you're in an area and only have B12 LTE signal you won't be able to make or receive calls or texts. And in an emergency scenario if there was no other network for your phone to roam to, you also wouldn't be able to dial 911. Kinda an important feature imo.
I use the 930F on t-mobile and will likely do the same with the s8. If you care about rooting, you should get a 950f. It can be rooted easily and with root, you can get TKKG1994's CSC selection tool and use it to enable VOLTE/Wifi calling). If you aren't going to root, then the carrier phone is good.
I don't know how gigabit LTE is affected but I doubt in 2017 this is a game changer.

Note 9 us version on tmobile

Hi guys,
I'm new here and want to get yalls opinion and expertise if the unlocked US version Note 9 will work fully on tmobile network? I got it from b&h photo as it has a lot of freebies (Dex and the new dual charger) plus there's no tax.
No. 1 priority for me is if tmobile band 71 will work on this us version note 9.
Thank you in advance for all your comments and suggestions.
Great question. As far as I can tell, it has Band 71 (600mhz)...
I think TM uses some of the lowest frequencies over other carriers, like their cement drilling band 71....aweosme.
See pic attached.
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Sent from my SM-N950U using Tapatalk
It should work with all bands. Just don't expect HD voice, VOLTE or Wi-Fi calling to work.
It will absolutely have Wi-Fi calling and VoLTE. I've had several unlocked phones with them and they all offer both options. T-Mobile is very open to outside devices.
I appreciate y'alls reply.
I've read you can flash tmo's firmware with this unlocked phones to get tmo features, is that true?
Jrbn2g said:
I appreciate y'alls reply.
I've read you can flash tmo's firmware with this unlocked phones to get tmo features, is that true?
Click to expand...
Click to collapse
For the Note 8 it is as long as it was Snapdragon.. Don't know about the Note 9.
It'll work
Jrbn2g said:
I appreciate y'alls reply.
I've read you can flash tmo's firmware with this unlocked phones to get tmo features, is that true?
Click to expand...
Click to collapse
What t-mo features are you talking about? The only one's important enough I'm thinking of are VOLTE and wi-fi calling which the unlocked model supports.
Jrbn2g said:
I appreciate y'alls reply.
I've read you can flash tmo's firmware with this unlocked phones to get tmo features, is that true?
Click to expand...
Click to collapse
Has this been figured out? My wife and I bought unlocked Note 9's yesterday. We have wifi calling, but my wife misses having video calling. So is it possible to flash the tmobile firmware to enable that and any other missing features from the t-mobile note 9?
streetracer8605 said:
Has this been figured out? My wife and I bought unlocked Note 9's yesterday. We have wifi calling, but my wife misses having video calling. So is it possible to flash the tmobile firmware to enable that and any other missing features from the t-mobile note 9?
Click to expand...
Click to collapse
Yes you can flash the tmobile firmware as long as the device you have is the US Snapdragon Note 9.
Semantics said:
It should work with all bands. Just don't expect HD voice, VOLTE or Wi-Fi calling to work.
Click to expand...
Click to collapse
VoLTE and wifi calling both work
TechOut said:
VoLTE and wifi calling both work
Click to expand...
Click to collapse
How about video calling?
Semantics said:
How about video calling?
Click to expand...
Click to collapse
Don't know never used it
Just got mine one hour ago and so far I can confirmed that WiFi Calling is working, my phone still going thru all the updates and downloading apps on a slow internet connection here in the office.
How can I check what band is my phone using?
Jrbn2g said:
Just got mine one hour ago and so far I can confirmed that WiFi Calling is working, my phone still going thru all the updates and downloading apps on a slow internet connection here in the office.
How can I check what band is my phone using?
Click to expand...
Click to collapse
Use either LTE Discovery or Cell Mapper, both can be found in the Google Play Store.
Sent from my SM-N960U using XDA Labs
Damn! Video calling is definitely missing on t-mobile. Can someone post a tutorial as to how to flash to a t-mobile software?
Jrbn2g said:
Hi guys,
I'm new here and want to get yalls opinion and expertise if the unlocked US version Note 9 will work fully on tmobile network? I got it from b&h photo as it has a lot of freebies (Dex and the new dual charger) plus there's no tax.
No. 1 priority for me is if tmobile band 71 will work on this us version note 9.
Thank you in advance for all your comments and suggestions.
Click to expand...
Click to collapse
I read somewhere that RCS messaging doesn't work on t mobile for the unlocked note 9.
Sent from my SM-N960U1 using Tapatalk
Semantics said:
It should work with all bands. Just don't expect HD voice, VOLTE or Wi-Fi calling to work.
Click to expand...
Click to collapse
I do have the unlocked version on T-Mobile and everything you mentioned is supported. Check next time before posting wrong information.
Darknightkiller said:
I do have the unlocked version on T-Mobile and everything you mentioned is supported. Check next time before posting wrong information.
Click to expand...
Click to collapse
And how did you verify all of these features are working?
Darknightkiller said:
I do have the unlocked version on T-Mobile and everything you mentioned is supported. Check next time before posting wrong information.
Click to expand...
Click to collapse
Confirm what features don't work. I'd hazard a guess.. RCS on the stock messaging app.
Sent from my SM-N960U1 using Tapatalk

T MOBILE Speed is low on FD models?

I remember when I had the note 8 N Version you had to change csc but don't think csc change does anything lol
Am I the only one?
TheUndertaker21 said:
I remember when I had the note 8 N Version you had to change csc but don't think csc change does anything lol
Am I the only one?
Click to expand...
Click to collapse
Try this.
http://tekhd.com/detonator/#tmodetonator
Xshooter726 said:
Try this.
http://tekhd.com/detonator/#tmodetonator
Click to expand...
Click to collapse
I'm on it now.
Doesn't seem. To make any different besides voice lte
TheUndertaker21 said:
I'm on it now.
Doesn't seem. To make any different besides voice lte
Click to expand...
Click to collapse
i'm using the 960F/DS, with an ATT CSC and i get HD Voice with both ATT and T-Mobile calls (i see the HD symbol on the Google Dialer/Phone). i've been very happy with my T-Mobile LTE cellular internet speeds in my low-signal coverage neighborhood. will test again and post results from current biz trip where T-Mobile has excellent coverage on internet speeds.
d.cortez said:
i'm using the 960F/DS, with an ATT CSC and i get HD Voice with both ATT and T-Mobile calls (i see the HD symbol on the Google Dialer/Phone). i've been very happy with my T-Mobile LTE cellular internet speeds in my low-signal coverage neighborhood. will test again and post results from current biz trip where T-Mobile has excellent coverage on internet speeds.
Click to expand...
Click to collapse
That's amazing.
Which one did you flash?
TheUndertaker21 said:
That's amazing.
Which one did you flash?
Click to expand...
Click to collapse
i didn't use the flash method; couldn't find a flashable file with an ATT CSC for the Note9. so...i extracted and copied-pasted the ATT CSC folder/files from ATT's most recent full ROM and manually edited the necessary dat files in the omc and /efs/imei folders on my phone. that being said, neither ATT nor T-Mobile WiFi calling and video calling work, but that's not an issue for me. i use the Google Dialer and Duo for video calls.
d.cortez said:
i didn't use the flash method; couldn't find a flashable file with an ATT CSC for the Note9. so...i extracted and copied-pasted the ATT CSC folder/files from ATT's most recent full ROM and manually edited the necessary dat files in the omc and /efs/imei folders on my phone. that being said, neither ATT nor T-Mobile WiFi calling and video calling work, but that's not an issue for me. i use the Google Dialer and Duo for video calls.
Click to expand...
Click to collapse
Clever.
I have both working but I need speed more than voice lte since I barely talk on the phone
And use what'sapp
T-Mo cellular internet speeds in DC... Remember this is with an AT&T CSC configuration on my dual SIM note 9, with TMobile SIM selected for calls, text and data.
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Sent from my SM-N960F using Tapatalk
I use simplemobile, which is an mnvo of t-mobile and this is what im getting in LA with the T-mobile tekhd zip.
With Tmobile I had to delete the 12 band and then restart the phone
chavist said:
With Tmobile I had to delete the 12 band and then restart the phone
Click to expand...
Click to collapse
What MCCI code did you use to access the services menu on your Note 9?
Sent from my SM-N960F using Tapatalk
d.cortez said:
What MCCI code did you use to access the services menu on your Note 9?
Click to expand...
Click to collapse
Here is the link that shows how to do it https://forum.xda-developers.com/tm...how-to-selecting-deselecting-network-t3597777
chavist said:
Here is the link that shows how to do it https://forum.xda-developers.com/tm...how-to-selecting-deselecting-network-t3597777
Click to expand...
Click to collapse
thanks for the link; i figured out the codes shortly after posting my message.
Rather than turning off band that provider might actually use in some situations, try turning off band that you possibly won't use, like band 39, or whatever.
See if that fixes preference to band 4, while still maintaining band 12 for odd situation.
I'm only saying this, because in Canada for provider freedom, band 66 is the fastest, and international phones actually prefer to connect to band 4 which is the slowest for this particular provider. Since we don't have access to modem settings since oreo, I found that disabling any of the unused bands (30,46,39 whatever), brings back proper behaviour like Canadian model counterparts, choosing band 66 majority of times, while still maintaining band 4 for building penetration.
Just try, give a few minutes, check on *#0011#, see if you're still defaulting to 12, or something else with more throughput, might work, might not.
Sent from my phone

Question Vodafone UK - no 4G+/5G

Has anyone else got a CN version and on Vodafone UK? I can't seem to get 4G+ or 5G to work. Download speeds on 4g are a lot less than my S21 and Cellmapper seems to confirm no LTE-A or NR. Even tried a SIM swap but that doesn't seem to have helped.
It's fine with my EE SIM, shows 4g+
Some googling shows others with similar issues with no CA on some European networks but others are fine. Wondering if the EEA firmware is likely to have a different modem config file?
I have a CN model and my EE gets 4G+ and 5G without any issues.
I also have a work phone on Vodafone. If I take the Vodafone SIM and put it inside my Mi 11 Ultra, it only shows as 4G. 5G won't turn on either even though it's supported in my price plan and works on my work phone.
One thing I have noticed is that the CN model does not support Band 32/1400MHz SDL, which Vodafone in the UK uses whereas EE does not - could this be the main difference as your area happens to rely on this band?
I don't think that's the issue. My local area masts only have band 1,7 and 20 anyway on Vodafone UK and on my S21 Ultra I get CA ok.
chistery said:
I don't think that's the issue. My local area masts only have band 1,7 and 20 anyway on Vodafone UK and on my S21 Ultra I get CA ok.
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Strange, not sure what it could be. Likely some sort of firmware issue/config matter then as I can't get LTE on my Vodafone work SIM either.
Hopefully once it's out in the UK I can replace the firmware with that version. I will try the global one next week though.
The xiaomi.eu roms are based on the CN version, so likely to have the same modem files I assume.
Have you changed the sim cards with newer ones to rule out some old SIM cards issues ?
Jhonxs said:
Have you changed the sim cards with newer ones to rule out some old SIM cards issues ?
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Yes, tried a SIM swap, still no CA on Vodafone.
4G+ should active automatically when network have these combinations available on network: https://cacombos.com/device/M2102K1C . Chinese devices doesn't support all 4G Carrier Aggregation combinations used in Europe so that could be reason why you don't see 4G+ active.
That's why it's recommend buy Global version: https://cacombos.com/device/M2102K1G
olkitu said:
4G+ should active automatically when network have these combinations available on network: https://cacombos.com/device/M2102K1C . Chinese devices doesn't support all 4G Carrier Aggregation combinations used in Europe so that could be reason why you don't see 4G+ active.
That's why it's recommend buy Global version: https://cacombos.com/device/M2102K1G
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If this is the explanation, i guess there is nothing to do except switching the chinese for global version ?
I think we're just waiting for someone to try the global or EEA version, not brick their phone, and report back on whether CA is now active.
chistery said:
I think we're just waiting for someone to try the global or EEA version, not brick their phone, and report back on whether CA is now active.
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I hope im wrong but i think when it comes to network bands its only about hardware , not software .
Hopefully this can be fixed by software stuff but i doubt it .
Before i bought the phone , i checked bands support and all the UK ones were supported . But it looks like things are more complicated than just supported bands .
I believe CA is a software issue, as the modem just need to know which bands can be aggregated together.
I just downgraded to the Global 12.0.1 version and still no CA.
Well , if someone could tell us what are the odds of this being somehow fixed in the future , i would be really grateful. If there are no chances for some fix , i will definitely sell it even though i freaking love this phone .
vendetta17 said:
If this is the explanation, i guess there is nothing to do except switching the chinese for global version ?
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Well there is not much todo because CA combinations are defined in modem firmware. Changing OS to different version may not change modem firmware.
chistery said:
I believe CA is a software issue, as the modem just need to know which bands can be aggregated together.
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These are configured to modem firmware. You can't change these values because it requires source code of modem and then compile it. We don't have modem source code so we can't change carrier aggregation combinations.
So only what we know is support per devices - https://cacombos.com have good database
Considering this , anyone from UK wants to buy a Mi 11 Ultra 12 / 512 ? Thanks .
Just tried a Global version, and 4G+ works fine.
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And the CN version:
So moral of the story, it's not just about the LTE bands it supports. I'll know for next time!
chistery said:
Just tried a Global version, and 4G+ works fine.
View attachment 5299241
And the CN version:
View attachment 5299243
So moral of the story, it's not just about the LTE bands it supports. I'll know for next time!
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You switched to global or you'll keep the chinese one ?
Switched to global, now need to sell my CN version.
chistery said:
Switched to global, now need to sell my CN version.
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Could of just switched to the global rom , would of got the same result.

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