Att version unlocked ( fully paid) on T-Mobile? - Samsung Galaxy S9+ Questions & Answers

USA snapdragon.
Any frequency issues? Can they be fixed?
Any T-Mobile features not useable?

As far as I know (saw on other threads) T-Mobile supports all versions. Or better said, T-Mobile won't block any features if you use another phone on their network.

hometech99 said:
USA snapdragon.
Any frequency issues? Can they be fixed?
Any T-Mobile features not useable?
Click to expand...
Click to collapse
Hi can you tell me how you unlocked att s9 plus, i'm not able to unlock with att or third party unlock site, thanks in advance.

Mine is bought outright.
Then requested unlock code on at&t site.
An independent dealer told me her att phone wouldn't do hotspot when on tmobile.
Maybe that varies per phone model and/or android version.
Would have to try to be sure.

Hi,
Have an unlocked ATT phone on Tmobile, wifi calling doesn't work.

That's why I'm staying on att...plus asking around, tmobile still needs better coverage here.

Related

Would ordering s9+ unlocked version from samsung work ok on ATT without any issues?

Pros/Cons?
Pro: No AT&T preinstalled bloat
I'm using an Essential PH-1 unlocked with AT&T. No problems.
Used a Mate 9 unlocked on ATT with no problem. Most US unlocked phones should work without any problems on ATT
VoLTE or HD calling as AT&T calls it might work on an unlocked phone if they will provision your line for the service. They did it for my Pixel 2 and it worked after I got a new sim. I don't think wifi calling will work on any phone except an AT&T device. I would make good use of this service so I'm opting for the AT&T version. If I find wifi calling works on an unlocked model I may switch but I don't think it will. We do some vacationing at a place with wifi but no cell service. My wife's AT&T iphone has it and it's pretty cool.
If the unlocked version is snapdragon then it will work just fine and lock to USA AT&T. With the S8 phones they were unlocked until you put a SIM in it and then it locks to that carrier. I'm curious is the unlocked version the exynos or the Snapdragon?
highaltitude said:
If the unlocked version is snapdragon then it will work just fine and lock to USA AT&T. With the S8 phones they were unlocked until you put a SIM in it and then it locks to that carrier. I'm curious is the unlocked version the exynos or the Snapdragon?
Click to expand...
Click to collapse
The snapdragon is the only processor sold in the usa whether you are unlocked or carrier specific.
Having issues with SM-G965F on AT&T LTE
I just activated my SM-G965F and I'm only getting 3G and 3.5G (H+). No LTE. If I change the mobile networks settings to nxtgenphone, it connects to LTE, then drops and I get no data. I can only use the 'phone' version. My AT&T account has a grayed out device for my account. Checking compatibility with the IMEI checker for AT&T says it cannot determine if it is compatible. the 2nd SIM slot IMEI number is considered invalid!
Heading to the AT&T store at the mall later... not expecting much help.
I have the Note 8 and it was a PITA to get it full working on AT&T. Only thing that interest me was the Volte for talking on the phone and data at the same time, never got it working 100%. Had AT&T provision with new chip still not working good, so I sold the unlocked and got an AT&T model and had it unlocked and all is working well.
Sent from my SM-G965U using Tapatalk
[Resolved] Having issues with SM-G965F on AT&T LTE
poodull said:
I just activated my SM-G965F and I'm only getting 3G and 3.5G (H+). No LTE. If I change the mobile networks settings to nxtgenphone, it connects to LTE, then drops and I get no data. I can only use the 'phone' version. My AT&T account has a grayed out device for my account. Checking compatibility with the IMEI checker for AT&T says it cannot determine if it is compatible. the 2nd SIM slot IMEI number is considered invalid!
Heading to the AT&T store at the mall later... not expecting much help.
Click to expand...
Click to collapse
It was not the APN settings, entirely. It was that myAT&T would not recognize my IMEI number as a 9+. So, working with a store clerk at the local mall, she suggested to punch in a fake(last number altered) IMEI number using the in-store SM-G965U models. Since this has nothing to do with actually logging in or SIM verification, it worked. The SIM does its job and my account has an S9 (not a plus) on it, so when I changed to the 'nxtgenphone' APN settings, it is 'allowed' to log in (that's my best guess, anyway).
There is no other reason why the SM-G965F would NOT work on AT&T LTE since it has 3 of the 4 LTE bands (band30 is not included, but is only used in new, dense environments to alleviate network congestion -- my understanding).
dmb219 said:
The snapdragon is the only processor sold in the usa whether you are unlocked or carrier specific.
Click to expand...
Click to collapse
So if I buy and ship an unlocked Galaxy S9 from Samsung website, it will have Snapdragon and not Exynos? I'm in a US territory.
I'm getting a good deal off their website with accessories and whatnot buying unlocked but I prefer Exynos
I'd rather not post and make a new thread. If someone else can confirm, I'd be much obliged
Yep it does. Just make sure it's on Snapdragon.

S9+ Unlocked vs T-Mobile Variant

Does anyone know what differences there might be between the Unlocked version and the T-Mobile variant? I'm wondering if there are any features missing from the Unlocked version while on the T-Mobile network (like how on the VZW version Wifi calling is apparently not usable on the Unlocked version).
Any info would be great, thanks.
The unlocked one has the mobile data toogle while Tmobile dont have it. Wifi calling running fine on the unlocked ones with Tmobile services. Hope that could help you.
AS I understand there aren't many differences between them.

Carrier Unlocking the U.S. S9/S9+

My question remains, when carrier unlocking an s9 or s9+, is there any way to make it available on different network types like say if the phone started out using a carrier that uses CDMA, is their any way to flash it to utilize t-mobile's frequency bands?
I unlocked two galaxy s9+'s that were on xfinity, which uses verizon towers. The two phones did unlock, but only for carriers utilizing CDMA. I was hoping they would be able to be used on t-mobile after unlocking, but they can't. Only messaging and data works using a t-mobile SIM card. Verizon works fine. SO my question still remains, is there a way to make it work?
I used itekimei .com to have the phones unlocked, as I found they were suggested here on XDA. And they weren't really able to answer my question either. They said it should work with t-mobile, but the conversation ended with "t-mobile is having problems with unlocked phones." This is super frustrating trying to get an answer.
Edit: I found this forum https://forum.xda-developers.com/galaxy-s9-plus/help/sim-unlocking-sprint-samsung-galaxy-s9-t3783571 which debates whether it will work or not. Also this one specifically about Xfinity https://forum.xda-developers.com/galaxy-s9-plus/help/xfinity-mobile-unlock-service-t3796349. But mine didn't work. I don't think U.S. S9's are cross compatible from CDMA to GSM. I have been searching and searching and can't find a way.
Yes, the US unit hardware is cross compatible. Heck, Verizon itself isn't all CDMA. They are phasing out CDMA soon and most of their network is LTE.
I have a US unlocked S9+ and can use any carrier in the US. You could too, all you need to do is flash the US Unlocked firmware to the device using Odin.
Your problem may be the Xfinity firmware restricting certain bands is all. Or possibly the device isn't really unlocked.
Regards,

No ATT HD Voice on unlocked S9+

Hello,
I just bought the S9+ unlocked today at best buy. I love the phone and I opted in for unlocked version so that I can root the thing later if I wish.
So, I would really like to have the HD voice option, but I found out that you need a carrier phone to be able to have wifi-calling and hd voice. My parent can hear me great on their end (they have iphones) but on my end I have the same old ****ty voice quality.
Is flashing ATT firmware (and getting their bloatware) the only way to get the option? Right now, when I go into settings-> connections-> mobile networks, the option isnt even there.
Reason is the same as I posted on a different thread. Flashing at&t firmware will not fix the problem. Subsequent comments in the thread may be of interest.
https://forum.xda-developers.com/showpost.php?p=77649772&postcount=7
Ouch. That sucks. I read somewhere that tmobile and sprint don't lock unlocked phones out of their volte and wifi calling. Does Verizon use same tactics as att or will they make it available to me as well?
fen-q said:
Ouch. That sucks. I read somewhere that tmobile and sprint don't lock unlocked phones out of their volte and wifi calling. Does Verizon use same tactics as att or will they make it available to me as well?
Click to expand...
Click to collapse
Yeah att doesn't have volte on any unlocked Phones. I put a sim in my Sprint S8 and it dropped to H+ during the call where TMO and vzw stay on VOLTE on my phone.
Sent from my SM-G950U using Tapatalk
Same issue in Canada - Carrier Unlocked device purchased do from Samsung & none of the Canadian Carriers support VoLTE or WiFi Calling - This is extremely unethical on the part of the partnership between Samsung & the Carriers! We all know that the Carriers are Samsung's biggest customers - But to make key features unavailable is unconscionable! ?
Sent from my SM-G965W ??
shaggyskunk said:
Same issue in Canada - Carrier Unlocked device purchased do from Samsung & none of the Canadian Carriers support VoLTE or WiFi Calling - This is extremely unethical on the part of the partnership between Samsung & the Carriers! We all know that the Carriers are Samsung's biggest customers - But to make key features unavailable is unconscionable!
Sent from my SM-G965W
Click to expand...
Click to collapse
For the US carriers though... if i switch to tmobile, will hd voice work if i call my parents on att? Anyone have real life experience?
fen-q said:
For the US carriers though... if i switch to tmobile, will hd voice work if i call my parents on att? Anyone have real life experience?
Click to expand...
Click to collapse
T-Mobile and Verizon customers both get VoLTE on Samsung factory unlocked phones. AT&T restricts by IMEI (as well as requiring their firmware). Sprint does not yet offer the feature at all on their network. It is unclear whether unlocked devices will get it once they do deploy it. Time will tell.

Question Does it matter which model i get? XQ-CT62 US version or Global version?

Hey guys when i go to Sony website and look up bootloader unlock instructions. it says the US variant is locked by verizon.
this is the version i have. Does that mean i cannot unlock bootloader? do i need to return my phone and the global version? The guides posted on here don't seem to mention the model number as if it matters.
Unlock Bootloader - Open Devices - Sony Developer World
developer.sony.com
Unless anything has changed, it is generally known that Verizon phones have a locked bootloader for customer security and in Verizon's interest.
ze7zez said:
Unless anything has changed, it is generally known that Verizon phones have a locked bootloader for customer security and in Verizon's interest.
Click to expand...
Click to collapse
Yea I am a first time sony buyer. the phone i have is actually the 5 IV which we don't have a forum for yet.
I usually am buying older phones with established guides and hacks to unlock on here. So i simply missed this since i didn't see it plastered everywhere on the front page of the some other sony forums. my bad.
I am not surprised. just ordered the wrong one thinking it didn't matter for the sony brand.
returning mine now. and ordering the 72.
thud1 said:
Yea I am a first time sony buyer. the phone i have is actually the 5 IV which we don't have a forum for yet.
I usually am buying older phones with established guides and hacks to unlock on here. So i simply missed this since i didn't see it plastered everywhere on the front page of the some other sony forums. my bad.
I am not surprised. just ordered the wrong one thinking it didn't matter for the sony brand.
returning mine now. and ordering the 72.
Click to expand...
Click to collapse
It's the same reason I returned US version and bought international version ct72 . So make sure about bands supports for 71 it has 66 which is TMobile and band 41 which i get some good speed depending on the location I'm in.
same here I wanted to root and Use Repainter app and change fonts and I did have the CT62, but I return it back to Sony and bought the CT72, sad that sony doesn`t allow the bootloader to be unlocked on the CT62.
2015Ducatimulti said:
same here I wanted to root and Use Repainter app and change fonts and I did have the CT62, but I return it back to Sony and bought the CT72, sad that sony doesn`t allow the bootloader to be unlocked on the CT62.
Click to expand...
Click to collapse
Right i thought they allowed bootloader unlocked on any Xperia really sucks that they didn't allowed it on US specially if I'm paying 1600+ on it lol
raven213 said:
Right i thought they allowed bootloader unlocked on any Xperia really sucks that they didn't allowed it on US specially if I'm paying 1600+ on it lol
Click to expand...
Click to collapse
my exact thoughts, 1600.00, no thanks, buy the CT72 and save some money, only thing is you don`t get the USA warranty when you buy the Non-US version, and some missing 5G band`s and the missing MMWave bands
As @2015Ducatimulti mentioned, there is something missing there between the two version.
There is Hardware differences between CT72 and CT62. The US version supports has mmW support and also more bands that are available in the US such as band 2, 66, and 71 used by TMO in addition to mmW 260 and 261.
if your carrier does not have use of these bands and mmW frequencies, then the CT72 should still work as long as you flash the US version ROM. otherwise, you will have coverage issues due and high call drops due to the limited US band support
hnt20 said:
As @2015Ducatimulti mentioned, there is something missing there between the two version.
There is Hardware differences between CT72 and CT62. The US version supports has mmW support and also more bands that are available in the US such as band 2, 66, and 71 used by TMO in addition to mmW 260 and 261.
if your carrier does not have use of these bands and mmW frequencies, then the CT72 should still work as long as you flash the US version ROM. otherwise, you will have coverage issues due and high call drops due to the limited US band support
Click to expand...
Click to collapse
Flashing US ROM on ct72 will give you signal issues. So far i haven't found a way to get signal working on it.
That might make sense since the RF hardware is different between them and hence the software might not work as expected
FWIW, I just got the Xperia 1 IV, CT-72, using it on AT&T (primary subscriber, no MVNO). Just using the stock ROM, didn't flash any other ROMS.
So far I appear to have 5G as well as VoLTE. No VoWIFI, but I don't care about that anyway.
I'll use it for another week or so to see if AT&T decides to shutdown service for a non whitelisted device, but so far so good. And it was $840 new, vs $1600 for the USA version, so a HUGE cost difference
I by the way did first have to do the trick where you disable dual-sim and only use the primary SIM slot.
Sakete said:
FWIW, I just got the Xperia 1 IV, CT-72, using it on AT&T (primary subscriber, no MVNO). Just using the stock ROM, didn't flash any other ROMS.
So far I appear to have 5G as well as VoLTE. No VoWIFI, but I don't care about that anyway.
I'll use it for another week or so to see if AT&T decides to shutdown service for a non whitelisted device, but so far so good. And it was $840 new, vs $1600 for the USA version, so a HUGE cost difference
I by the way did first have to do the trick where you disable dual-sim and only use the primary SIM slot.
Click to expand...
Click to collapse
Is your CT-72 still working on AT&T?
tonysunshine said:
Is your CT-72 still working on AT&T?
Click to expand...
Click to collapse
Mine is still going fine on Att elite
David.k20z1 said:
Mine is still going fine on Att elite
Click to expand...
Click to collapse
XQ-CT72 No go on Cricket. Data works fine but no calls.

Categories

Resources