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What is required for band unlocking? I understand that the chipset/radio in this phone has a large compatibility with wcdma/utms bands and as it supports a large number of gsm bands, the antenna should be able to rx/tx on the same frequencies for the 3g protocols.
When you flash a radio.img, is this flashing the phones radio/chipset with an updated configuration (eg, radios nvram/bios), or is this just part of the android config which contains the driver for the chipset?
Depending on the answers to the above questions, band unlocking could be achieved by either editing the radios nvram (using a motorola service tool or the like), or flashing a radio.img from a phone with the same chipset but the appropriate bands configured, OR a combination of the two...orthe hard road, hardmodding.
It would be greatly appreciated if someone in the know would be able to contribute to this. Thanks.
I really hope the radio baseband will be flashable soon, so I can turn my XT862s baseband into XT860.
Im not sure i understand what you gain from that? Outside the US aren't they both the same, just that the XT862 has CDMA enabled additionally?
They both feature WCDMA(UTMS) 850/1900/2100, GSM 850/900/1800/1900, just the Droid 3(XT862) also has CDMA 800 / 1900, CDMA2000 1xEV-DO, and can't be used on other US carriers?
Please correct me if I am wrong.
The reason I wish to band unlock is to gain WCDMA(UTMS) 900, as my carriers network uses both the 2100(metro) and 900(rural), offering patchy reception in regions without GSM coverage and poor speed in areas with GSM 900 + WCDMA(UTMS) 900.
bgdwiepp said:
Im not sure i understand what you gain from that? Outside the US aren't they both the same, just that the XT862 has CDMA enabled additionally?
They both feature WCDMA(UTMS) 850/1900/2100, GSM 850/900/1800/1900, just the Droid 3(XT862) also has CDMA 800 / 1900, CDMA2000 1xEV-DO, and can't be used on other US carriers?
Please correct me if I am wrong.
The reason I wish to band unlock is to gain WCDMA(UTMS) 900, as my carriers network uses both the 2100(metro) and 900(rural), offering patchy reception in regions without GSM coverage and poor speed in areas with GSM 900 + WCDMA(UTMS) 900.
Click to expand...
Click to collapse
Yes, however some people here and on droidforums have said that the XT860s baseband radio has better GSM performance.
Also, for example, the XT860 has callforwarding while the XT862 has not
So, I eventually changed to the XT883 Chinese rom, of course reception didn't improve (signal in dbm did not change) however it appears to have a better interpretation of the reception (eg, i could make perfectly fine calls on 0 bars on the 862 because the signal was strong, it just showed as being weak), options like call forwarding are useful too, however, all in all, this did not fix my lack of 900MHz W-CDMA, so, I flashed a radio from the Droid 2 Global, and it seems fine so far, currently I am not in a 900Mhz band region, but tomorrow I am, and will hopefully be able to see how it goes.
bgdwiepp said:
Im not sure i understand what you gain from that? Outside the US aren't they both the same
Click to expand...
Click to collapse
Definitely not.
I did a few days of thorough testing, and they are incredibly similar - as far as performance goes, it is almost identical, the only difference is the XT883 will hold the connection better because it has more tolerance for error and lower signal, so provided the connection is up, they are almost identical.
The XT883 also has a lower signal threshold for switching between GSM and UMTS, it will hold for longer before switching, and also negotiate a data connection at a lower signal level too.
The XT883 offers more features (like call forwarding and so on) and a more "friendly" representation of your signal status, but no more actual signal, or performance.
Note, this testing was on the 850 and 2100MHz UMTS bands and the 900Mhz GSM band.
bgdwiepp said:
I did a few days of thorough testing, and they are incredibly similar - as far as performance goes, it is almost identical, the only difference is the XT883 will hold the connection better because it has more tolerance for error and lower signal, so provided the connection is up, they are almost identical.
The XT883 also has a lower signal threshold for switching between GSM and UMTS, it will hold for longer before switching, and also negotiate a data connection at a lower signal level too.
The XT883 offers more features (like call forwarding and so on) and a more "friendly" representation of your signal status, but no more actual signal, or performance.
Note, this testing was on the 850 and 2100MHz UMTS bands and the 900Mhz GSM band.
Click to expand...
Click to collapse
Well, shouldn't it be relatively easy to find/edit a file that holds this threshold?
bgdwiepp said:
The XT883 also has a lower signal threshold for switching between GSM and UMTS, it will hold for longer before switching, and also negotiate a data connection at a lower signal level too.
Click to expand...
Click to collapse
The threshold is the same, it's the measurement that is incorrect (purposely incorrect).
The XT883 offers more features (like call forwarding and so on) and a more "friendly" representation of your signal status, but no more actual signal, or performance.
Click to expand...
Click to collapse
Given the above in the same place where an XT883 hold the 3g connection an xt862 switches in 2g, which practically means better performance, even if the radios have more or less the same sensitivity.
BTW usually the true GSM phones like the Milestones 1 and 2 have usually a better radio than the global phones, likely this will apply even to the Milestone 3, indeed the sensitivity of D3 (the true one I mean) is way below the average, while the MS1 was well above the average.
Speaking of band unlock, will flashing XT862 with the Chinese ROM allow use on AT&T/T-Mobile in the US? Or the Chinese Roman doesn't have radio image in it?
Btw, I am not sure how can you enable feature like 900 WCDMA when phone doesn't have this. With MS1/2 it wasn't possible to switch between the 900/2100 (EMEA) and the 850/1900/2100 (NA) bands because hardware isn't there. Has this changed with Droid 3?
Sent from my XT860 using Tapatalk
As far as I know the D2 used the qualcomm MDM6600, and was actually capable of band unlocking on certain variants like this, the droid 3 also uses the MDM6600 which does support the 900Mhz band, and should work well.
leobg said:
Speaking of band unlock, will flashing XT862 with the Chinese ROM allow use on AT&T/T-Mobile in the US? Or the Chinese Roman doesn't have radio image in it?
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Click to collapse
The XT883 rom includes the radio but this doesn't allow the use of GSM in the US. (AFAIK)
Btw, I am not sure how can you enable feature like 900 WCDMA when phone doesn't have this. With MS1/2 it wasn't possible to switch between the 900/2100 (EMEA) and the 850/1900/2100 (NA) bands because hardware isn't there. Has this changed with Droid 3?
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Click to collapse
I'm almost sure that flashing a standard MS1 with an American FW was enough to use it in Canada or Argentina, and viceversa
The Solutor said:
The XT883 rom includes the radio but this doesn't allow the use of GSM in the US. (AFAIK)
I'm almost sure that flashing a standard MS1 with an American FW was enough to use it in Canada or Argentina, and viceversa
Click to expand...
Click to collapse
No, it wasn't working. I have MS1 and have experimented with it a lot. When you flash non-matching firmware, you lose 3G.
Sent from my XT860 using Tapatalk
Droid 3 finally band-unlocked?
Hi. Is what I saw true? Look at the bottom of the "[Q] Droid 3 and AT&T" thread for details.
I have a Note 2 that I bought from AT&T. I want to upgrade to the note 3 but I want the N9005 version because I believe that it will be able to use G4 LTE signal from AT&T. The only place that I can buy the unlocked N9005 version is at Negri Electronics. However it only sell the 16 gb version and I want the 32 gb version. Is there any other place in the U.S.A that sells the N9005 unlocked version?
Earthbrain said:
I have a Note 2 that I bought from AT&T. I want to upgrade to the note 3 but I want the N9005 version because I believe that it will be able to use G4 LTE signal from AT&T. The only place that I can buy the unlocked N9005 version is at Negri Electronics. However it only sell the 16 gb version and I want the 32 gb version. Is there any other place in the U.S.A that sells the N9005 unlocked version?
Click to expand...
Click to collapse
I don't think there is such a thing like a 16gb note 3. At least not yet.
xclub_101 said:
I don't think there is such a thing like a 16gb note 3. At least not yet.
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Click to collapse
http://negrielectronics.com/phones/android-mobile-c-67.html
According to the above link...the 16 gb version does exist.
Does the n9005 model have AT&T LTE for sure?
Sent from my LG-D800 using XDA Premium 4 mobile app
Earthbrain said:
I have a Note 2 that I bought from AT&T. I want to upgrade to the note 3 but I want the N9005 version because I believe that it will be able to use G4 LTE signal from AT&T. The only place that I can buy the unlocked N9005 version is at Negri Electronics. However it only sell the 16 gb version and I want the 32 gb version. Is there any other place in the U.S.A that sells the N9005 unlocked version?
Click to expand...
Click to collapse
Before committed to pay big $ for the phone ... check out this thread
http://forum.xda-developers.com/showthread.php?t=2457964
I'd buy what you're looking for in a heartbeat - if it existed. So far it doesn't. At least not ln any of the N3's for the UK, EU, or Latin America that have been announced. The Korean S-800 SGS4 supports AT&T's bands so their N3 probably will also. But the Korean phones have funky TV h/w and a funky MMS system that's different than Western versions. Rogers' (Canada) version will be compatible with AT&T LTE and may be closer to "virgin" than AT&T's version. The challenge is warranty service both because you'd have to send it to Canada for repair (assuming Rogers' services a phone for a non-subscriber) and because Knox prevents resetting the warranty status if a non-standard ROM's been flashed. Speaking of which, you'd probably only be able to flash Rogers' ROMs via Odin unless their N3 was a "pure" i9505 capable of using international ROMs.
And as someone above mentioned there's some question as to what "unlocked" means with the N3 as there are now regional limitations on top of carrier's locking phones to their networks.
If I find a true international N3 that works on AT&T's LTE that's not regionally SIM locked I'll let you know. Until then I'm sticking with AT&T's version and hoping they haven't molested it too badly.
Thread cleaned.
Lets knock off the keyboard hero stuff and get back on topic.
The N9005 doesn't work on AT&T LTE, it is missing bands 700/1700
designgears said:
The N9005 doesn't work on AT&T LTE, it is missing bands 700/1700
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Will the N9005 work on the Rogers network in Canada? I have no idea what these bands and frequencies mean, I just know that I need LTE to work.
choch69 said:
Will the N9005 work on the Rogers network in Canada? I have no idea what these bands and frequencies mean, I just know that I need LTE to work.
Click to expand...
Click to collapse
You can't just say "N9005" and expect to get an answer. "N9005" refers to generic Snapdragon 800 LTE capable version of GN3, but each country and carrier in the world has different LTE bands enabled in that Snapdragon's SoC radio. Find your Rogers here: http://en.wikipedia.org/wiki/List_of_LTE_networks
It operates on bands 4 and 7 - none of the Euro countries' carriers work on band 4, as you can see from the list. AT&T USA, T-Mobile USA and Rogers CA should be LTE cross compatible in most coverage areas, but not all.
If you buy N9005 version with unlocked bootloader - later, when someone makes Odin compatible with GN3 you will be able to flash Roger's LTE modem firmware to your N9005, no matter which country it is from and what LTE bands it currently has enabled
]
Okay well I was looking to buy an unlocked N9005 from the UK. Since none of the euro countries work on band 4, what about band 7? Do both bands need to be working in order to get LTE? The problem with buying this in my country is that there wont be a 64gb option available.
choch69 said:
]
Okay well I was looking to buy an unlocked N9005 from the UK. Since none of the euro countries work on band 4, what about band 7? Do both bands need to be working in order to get LTE? The problem with buying this in my country is that there wont be a 64gb option available.
Click to expand...
Click to collapse
Some carriers, which operate on dual band LTE use one band for upstream, and the other for downstream. If that is the case with Rogers you will have to have a phone with both bands enabled, to get LTE service from Rogers. However, even if that is not the case and both bands 4 and 7 are independent - Rogers has towers all over Canada, and in some regions those towers will operate on band 4, in other regions it will be band 7 and in some places towers will support both. By getting a phone that supports only band 7 you will greatly reduce your LTE coverage area. What percentage of Rogers' network uses what band - those details are publicly available, so you can either Google it or just call Rogers and ask. I would recommend against getting a phone, that supports only band 7, unless you plan on flashing Roger's modem to it later.
This not quite correct. A band, by definition includes both the up and downstream frequencies. Only one band is used at a time. Rogers happens to use band 4 and band 7. One is not reliant on the other. If you are in an area with band 7 coverage (most of Rogers LTE coverage has both) you will be able to use a N9005.
Apo11on said:
Some carriers, which operate on dual band LTE use one band for upstream, and the other for downstream. If that is the case with Rogers you will have to have a phone with both bands enabled, to get LTE service from Rogers. However, even if that is not the case and both bands 4 and 7 are independent - Rogers has towers all over Canada, and in some regions those towers will operate on band 4, in other regions it will be band 7 and in some places towers will support both. By getting a phone that supports only band 7 you will greatly reduce your LTE coverage area. What percentage of Rogers' network uses what band - those details are publicly available, so you can either Google it or just call Rogers and ask. I would recommend against getting a phone, that supports only band 7, unless you plan on flashing Roger's modem to it later.
Click to expand...
Click to collapse
omegacell said:
This not quite correct. A band, by definition includes both the up and downstream frequencies. Only one band is used at a time. Rogers happens to use band 4 and band 7. One is not reliant on the other. If you are in an area with band 7 coverage (most of Rogers LTE coverage has both) you will be able to use a N9005.
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Click to collapse
you're correct by claiming each band is self contained and and can carry both, upstream and downstream. However, each carrier owns only a small portion of the spectrum in the bands they operate on, and some carriers do practice using a single band for one way traffic only, in an effort to ease the network congestion and load balancing. I'm not saying it's Rogers - I have no information on that particular carrier, but some carriers do do that. I'm just saying for carriers, who use such practice, in order to get LTE service your phone's modem must have both bands enabled, otherwise it won't register with the network and you won't get LTE service at all.
Apo11on said:
you're correct by claiming each band is self contained and and can carry both, upstream and downstream. However, each carrier owns only a small portion of the spectrum in the bands they operate on, and some carriers do practice using a single band for one way traffic only, in an effort to ease the network congestion and load balancing. I'm not saying it's Rogers - I have no information on that particular carrier, but some carriers do do that. I'm just saying for carriers, who use such practice, in order to get LTE service your phone's modem must have both bands enabled, otherwise it won't register with the network and you won't get LTE service at all.
Click to expand...
Click to collapse
The OP needs to take into consideration that If he buys from an online retailer an international unit, this unit will need to be activated in its intended region before he can use it in the states.
Apo11on said:
you're correct by claiming each band is self contained and and can carry both, upstream and downstream. However, each carrier owns only a small portion of the spectrum in the bands they operate on, and some carriers do practice using a single band for one way traffic only, in an effort to ease the network congestion and load balancing. I'm not saying it's Rogers - I have no information on that particular carrier, but some carriers do do that. I'm just saying for carriers, who use such practice, in order to get LTE service your phone's modem must have both bands enabled, otherwise it won't register with the network and you won't get LTE service at all.
Click to expand...
Click to collapse
I've never heard of that. Seems like a problematic setup since the RF properties of bands can vary so much. Seems like you would get in a situation where you have up but not downstream or vice versa.
Yes, you would need a N9005 from Asia, not Europe as those are region locked.
omegacell said:
Yes, you would need a N9005 from Asia, not Europe as those are region locked.
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Click to collapse
Do you have a link for a source, where you got that information from? Or better yet - list of countries/markets, where GN3 will not be region locked?
Apo11on said:
Do you have a link for a source, where you got that information from? Or better yet - list of countries/markets, where GN3 will not be region locked?
Click to expand...
Click to collapse
Email me or hit me me up through my site. We're a retailer/wholesaler, not sure if I'm allowed to post about that since it would be "advertising".
omegacell said:
Email me or hit me me up through my site. We're a retailer/wholesaler, not sure if I'm allowed to post about that since it would be "advertising".
Click to expand...
Click to collapse
that is a valuable information, which a lot of people, watching this thread could use, not just me. I don't think it will be considered as advertising. People in this thread are looking to buy international GN3, which will work on AT&T in US. If the phone is region locked then it won't work. Therefore, listing the countries, where there is no region lock would be very much relevant to this topic.
Apo11on said:
that is a valuable information, which a lot of people, watching this thread could use, not just me. I don't think it will be considered as advertising. People in this thread are looking to buy international GN3, which will work on AT&T in US. If the phone is region locked then it won't work. Therefore, listing the countries, where there is no region lock would be very much relevant to this topic.[/QUOTEN
N9005 from HK or Singapore (perhaps others too) will work.
The South American N9000 are region locked to South American, North American, carribean etc. SIM cards (western hemisphere).
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So after the denim update, AWS (aka 1700/2100 or LTE Band 4) support for the icon(929) became available, and because of this I purchased the Icon and I love it. However I live in Canada and have a month to month plan with Mobilicity. I guess I didn't do my research well enough (I'd like to think the internet was a bit misleading but....i guess its matter of perspective). Mobilicity solely rely on the AWS band frequency. They don't offer LTE but instead use HSPA . I knew that already but I figured that since AWS was supported I could receive HSPA signal over the 4G radio but nope I was wrong.
So I guess there are enough distinct differences between HSPA on AWS and LTE on AWS enough for them to be not cross compatible? Is this a hardware "issue" or a firmware/software one that I could do something about? Is it possible to enable 2G/3G/HSPA over the 4G radio? Or maybe I can get it to work by setting the APN correctly? I looked at some phones specs over on GSMArena which do offer HSPA + LTE support over AWS, I really want to say that it seems unlikely that 2 or more pieces of hardware are required to offer 2 services on what is essentially the same frequency.
Hi,
I bought an one plus 3T in india and brought it to US. I'm getting only E not even 3G. When I enquired in T mobile/lyca store, i was told that india unlocked mobile won't support the US bands. Network upgraded. It was big surprise to me. Please suggest me how to unblock additional LTE bands in my 3T mobile.
That's not possible, you should trade your 3t A3003 for a 3t A3000 American band-unlocked model.
Check the specifications for each model under connectivity.
https://oneplus.net/us/3t/specs
Wait, what?
I live in Sri Lanka (Tiny country below India) and my 3T is the Indian device. I toured Europe for 2 weeks, and I used an O2 Sim, and used LTE in Europe for the whole time I was there. Have you tried going to Settings, and selecting "LTE/3G Only"? That may fix your issue.
I swear, there should be no issue with the bands.
thes3usa said:
Wait, what?
I live in Sri Lanka (Tiny country below India) and my 3T is the Indian device. I toured Europe for 2 weeks, and I used an O2 Sim, and used LTE in Europe for the whole time I was there. Have you tried going to Settings, and selecting "LTE/3G Only"? That may fix your issue.
I swear, there should be no issue with the bands.
Click to expand...
Click to collapse
India uses FDD 850, 1800 and TDD 2400. Most of the Europe uses TDD 1800. So you getting LTE in Europe is not a surprise.
USA uses 700, 1700, 1900, 2100, 2300
Varies with MSP
You will at least get 3G with T-Mobile and AT&T
Sent from my ONEPLUS A3003 using Tapatalk
thes3usa said:
Wait, what?
I live in Sri Lanka (Tiny country below India) and my 3T is the Indian device. I toured Europe for 2 weeks, and I used an O2 Sim, and used LTE in Europe for the whole time I was there. Have you tried going to Settings, and selecting "LTE/3G Only"? That may fix your issue.
I swear, there should be no issue with the bands.
Click to expand...
Click to collapse
Europe and india uses the same bands. I lived in uk and used the uk phones in india and indian phones over there. Its the states that uses different frequencies so most of phones don't work properly outside states.
smokin901 said:
India uses FDD 850, 1800 and TDD 2400. Most of the Europe uses TDD 1800. So you getting LTE in Europe is not a surprise.
USA uses 700, 1700, 1900, 2100, 2300
Varies with MSP
You will at least get 3G with T-Mobile and AT&T
Sent from my ONEPLUS A3003 using Tapatalk
Click to expand...
Click to collapse
bonham1988 said:
Europe and india uses the same bands. I lived in uk and used the uk phones in india and indian phones over there. Its the states that uses different frequencies so most of phones don't work properly outside states.
Click to expand...
Click to collapse
Ah, thanks for clearing that up for me. I had no clue that it uses the same bands.
thes3usa said:
Ah, thanks for clearing that up for me. I had no clue that it uses the same bands.
Click to expand...
Click to collapse
Compatibility of phones with the cell networks in the US are a total pain in the you-know-what. We have 4 different major carriers, all using different bands (a little bit of band sharing, but most completely different) for 3G and LTE (GSM is a little more standardized thankfully). Basically, as a general rule if a device not intended/designed to work on US (and depends on which exact US carrier), you are probably going to run into some incompatibilities (no 3G or no LTE, or limited connectivity).
redpoint73 said:
Compatibility of phones with the cell networks in the US are a total pain in the you-know-what. We have 4 different major carriers, all using different bands (a little bit of band sharing, but most completely different) for 3G and LTE (GSM is a little more standardized thankfully). Basically, as a general rule if a device not intended/designed to work on US (and depends on which exact US carrier), you are probably going to run into some incompatibilities (no 3G or no LTE, or limited connectivity).
Click to expand...
Click to collapse
Talk about synchronicity eh? But do the difference in bands give any speed differences, or call clarity? In the blind about these stuff, coming from a country that has only one carrier out of five who is still beta testing VoLTE.
thes3usa said:
But do the difference in bands give any speed differences, or call clarity?
Click to expand...
Click to collapse
Not an expert, and had to Google that. From what I'm reading, lower frequency (MHz) has better penetration (through buildings, etc.) while higher frequency bands have higher data capacity.
There are steps on how to unlock additional bands. There are like 50 steps. I dont remember where I've seen it but if you google how to unlock bands on OnePlus you will find it. Also try to flash Oxygen OS from US web site which I see no reason to work but just a suggestion lol
pk-air said:
Also try to flash Oxygen OS from US web site which I see no reason to work but just a suggestion lol
Click to expand...
Click to collapse
There are no region specific versions of OxygenOS, so this will do nothing but reflash the latest update.
pk-air said:
There are steps on how to unlock additional bands. There are like 50 steps. I dont remember where I've seen it but if you google how to unlock bands on OnePlus you will find it. Also try to flash Oxygen OS from US web site which I see no reason to work but just a suggestion lol
Click to expand...
Click to collapse
There are no steps at all. You cannot "unlock" bands, as they're hardware related. There's no way to switch bands out of the blue.
thes3usa said:
There are no steps at all. You cannot "unlock" bands, as they're hardware related. There's no way to switch bands out of the blue.
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Click to collapse
No you can't switch but you can unlock some bands which might help
https://forum.xda-developers.com/oneplus-3/how-to/guide-unlock-additional-lte-bands-t3519563
---------- Post added at 09:23 PM ---------- Previous post was at 09:16 PM ----------
pitrus- said:
There are no region specific versions of OxygenOS, so this will do nothing but reflash the latest update.
Click to expand...
Click to collapse
as I said I dont see any reason for it to work
thes3usa said:
There are no steps at all. You cannot "unlock" bands, as they're hardware related. There's no way to switch bands out of the blue.
Click to expand...
Click to collapse
At one time that was true. But for Qualcomm SoCs, the band support stopped being set in hardware (at least for the most part) some 3 years ago with Snapdragon 801 (or maybe earlier, but definitely with 801). Support for all or most bands (might be some exceptions) used worldwide is there, but the specific bands are enabled in firmware.
https://www.qualcomm.com/products/rf
That said, enabling bands is a long process as noted; and has the risk of resulting in a radio brick. So it's best to buy the correct region version OP3T (which supports the needed bands out of the box) when possible.
redpoint73 said:
At one time that was true. But for Qualcomm SoCs, the band support stopped being set in hardware (at least for the most part) some 3 years ago with Snapdragon 801 (or maybe earlier, but definitely with 801). Support for all or most bands (might be some exceptions) used worldwide is there, but the specific bands are enabled in firmware.
https://www.qualcomm.com/products/rf
That said, enabling bands is a long process as noted; and has the risk of resulting in a radio brick. So it's best to buy the correct region version OP3T (which supports the needed bands out of the box) when possible.
Click to expand...
Click to collapse
Why aren't all bands just enabled by default then? I don't understand why there are different models for different regions.
I have a US OP3T and I'm visiting India. It''s working with Jio in India (although it supports only only of the 3 bands used by Jio) but VoLTE doesn't work for some reason.
I have the Korean N950N and I would like to try flashing the N950F firmware. My N950N seems to have issues switching between HSPA+ and LTE/LTE+ to the point where sometimes I'll have zero LTE bars, and I get no data, but if I switch to 3G only, I'll have no problems and full bars. I don't think it's the CSC so I'm guessing the N firmware handles the wireless frequencies differently, even though it shouldn't. What's also weird is my G935F (S7e) always has at least one LTE bar when testing from locations where I get zero bars on the Note 8.
How do I create a TWRP flashable firmware package to change the model number/firmware and test that variable? I already know I can't flash with ODIN because the signatures won't match. Also, is there anything else that may be causing this issue? My S7e should *not* be getting better reception than my Note 8, based on everything I've been reading about improved modems.
You might want to check the supported frequency bands of the Korean note 8 and the band your carrier uses. Might be a hardware problem and cannot be solved by playing with software.
Sent from my SM-N950F using Tapatalk
vash_h said:
You might want to check the supported frequency bands of the Korean note 8 and the band your carrier uses. Might be a hardware problem and cannot be solved by playing with software.
Sent from my SM-N950F using Tapatalk
Click to expand...
Click to collapse
The N950F and N950N have literally the same hardware. They support all the same frequencies and have everything I need to connect to AT&Ts network. The only difference is the Korean N950N doesn't have the region lock and "jail" issues of the N950F. Additionally, I am able to get full LTE-A bars and speed in other areas and have no issues.
My problem is at my home I, at most, have one bar of LTE-A coverage. Sometimes that coverage drops to zero bars, and there isn't a switch to HSPA+/3G so I have issues sending texts and accessing mobile data until I either shift the phone and get a bar, or completely disable LTE and use HSPA+/3G exclusively.
Automatic switching between LTE and 3G is the issue, not support for the frequencies themselves.
EDIT: In addition, my SM-935F (S7 Edge) *never* loses LTE reception in the same areas and has never had this problem.
Some providers operate on two lte frequency bands. Perhaps one is supported the other isn't.
Most n950f doesn't have region locking.
Sent from my SM-N950F using Tapatalk
vash_h said:
Some providers operate on two lte frequency bands. Perhaps one is supported the other isn't.
Most n950f doesn't have region locking.
Sent from my SM-N950F using Tapatalk
Click to expand...
Click to collapse
Actually, almost all of them are region locked if you're buying for use in the US. And again: the supported frequencies aren't the issue. Even if they *weren't* supported, I should be switched to 3G when there's no LTE reception, which isn't happening. I just get zero LTE bars and no data instead of switching to 3G and slower data.
Additionally, the same exact frequencies are supported by my G935F (S7e) and it doesn't have that issue.
Aah.. american telco.. there is a reason they aren't selling n950f there but the sd variant.
And yes it's the frequency. I saw it somewhere but i can't recall.
Which telco are you on if you don't mind me asking
Sent from my SM-N950F using Tapatalk
vash_h said:
Aah.. american telco.. there is a reason they aren't selling n950f there but the sd variant.
And yes it's the frequency. I saw it somewhere but i can't recall.
Which telco are you on if you don't mind me asking
Sent from my SM-N950F using Tapatalk
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Yeah, the reason we have Snapdragon is some US Carriers use the CDMA network technology and It's easier to just use Snapdragons + their built in modem as opposed to gluing the Qualcomm modem in with Exynos (which was done only once with the S6 and Note 5 because the SD 810 was so ****ty). Either way, they'd have to pay royalties to Qualcomm for CDMA technology usage. But that's neither here nor there for my situation.
I'm on AT&T. It's a GSM based network and fully compatible. I literally have stated multiple times that I the phone supports all frequencies I need. I have the SM-N935F (S7e) which supports the *exact same frequencies* and I do not have the issue with that phone. My problem is handoff to 3G when there isn't good 4G coverage! It *never* hands off to 3G unless I've got a call active. If I have low reception, I'll just have zero 4G bars instead of switching to 3G. If I manually disable 4G I have full 3G reception. When I go elsewhere with better reception, 3G handoff is irrelevant because 4G is working with full speed.
Just to prove my point: Here is the frequency compatibility table for my International S7 Edge:
https://www.frequencycheck.com/carr...-edge-lte-a-samsung-hero-2/at-t-united-states
Here is the compatibility table for my Korean Note 8
https://www.frequencycheck.com/carr...d-lte-256gb-samsung-baikal/at-t-united-states
All the frequencies, minus one LTE frequency, is supported on both phones. My issue is I have *better* speeds/reception on my s7e and when I have low bars, it actually hands off to 3G where my Note 8 doesn't. AT&T is a fully GSM based network and compatible with the International Samsung phones. I've been buying them for years.
Frequency support is not the issue. If it was, I wouldn't get any 4G reception at all! I'd have to use 3G 100% of the time. I need to solve the 3G handoff issue when there's low/no 4G reception.