No data using unlocked AT&T Samsung S7- HELP

[OhAlfie]

My apologies if this has been dealt with elsewhere, if so please just point me where to go...

Last week we switched to T-Mobile from AT&T. I had AT&T unlock all 4 of our phones. That was done successfully.

So my wife starts using her S7 and she can make calls and text just fine, but she calls from work saying she has no data. Hmm. So I call tech support. They have me change Access Point info several times, but still no luck. Tech guy "escalates" things to "Engineering" but we haven't heard boo from them.

I was tinkering with the phone and recall Airplane mode can sometimes kickstart data issues, sure enough, if I turn Airplane Mode on, then off, I get full 4G LTE signal and we can surf. But the minute I reboot the phone, we lose data connection until I do the airplane trick.

Note that all of our other phones have no issues like this, and yes, tech says all phones show having full access to data.

So has anyone had this issue and successfully fixed it? If so how? It's driving us crazy.

Thanks in advance.

 

[loganbeck14]

My apologies if this has been dealt with elsewhere, if so please just point me where to go...

Last week we switched to T-Mobile from AT&T. I had AT&T unlock all 4 of our phones. That was done successfully.

So my wife starts using her S7 and she can make calls and text just fine, but she calls from work saying she has no data. Hmm. So I call tech support. They have me change Access Point info several times, but still no luck. Tech guy "escalates" things to "Engineering" but we haven't heard boo from them.

I was tinkering with the phone and recall Airplane mode can sometimes kickstart data issues, sure enough, if I turn Airplane Mode on, then off, I get full 4G LTE signal and we can surf. But the minute I reboot the phone, we lose data connection until I do the airplane trick.

Note that all of our other phones have no issues like this, and yes, tech says all phones show having full access to data.

So has anyone had this issue and successfully fixed it? If so how? It's driving us crazy.

Thanks in advance.

Try flashing a Tmobile firmware to the phone it will be more compatible with the network and also solve issues with cellular connectivity private message me so I can give you detailed instructions

 

[OhAlfie]

How do I do that? Thx

 

[loganbeck14]

How do I do that? Thx

Ok it's actually easier to give you instructions on the main thread but first I need you to make sure you have access to a computer unless you are actually using xda so assuming you are near your computer when you have time back up your wife's phone with smart switch, here is a download link http://www.samsung.com/us/assets/Smart_Switch_pc_setup.exe

 

[OhAlfie]

Matter of fact I got a call from T-Mobile telling me to try to "flash the software" and use the Smart Switch to back things up. I downloaded the Smart Switch for PC but when I tried to open it, it wouldn't install, gave me some weird error message.

So once I get the phone backed up, can you point me to how to flash the T-Mobile software? I'm crossing my fingers this is fairly easy since I'm not much of a tech when it comes to deeper smartphone tweaking (ROM's this and that lol).

Thanks for your help folks. I just want a smooth running phone vs. giving T-Mobile $30 more a month for an identical phone.

 

[loganbeck14]

Matter of fact I got a call from T-Mobile telling me to try to "flash the software" and use the Smart Switch to back things up. I downloaded the Smart Switch for PC but when I tried to open it, it wouldn't install, gave me some weird error message.

So once I get the phone backed up, can you point me to how to flash the T-Mobile software? I'm crossing my fingers this is fairly easy since I'm not much of a tech when it comes to deeper smartphone tweaking (ROM's this and that lol).

Thanks for your help folks. I just want a smooth running phone vs. giving T-Mobile $30 more a month for an identical phone.

So download Odin from here http://samsungodin.com/download/Odin3_v3.12.3.zip and then here is tmobile firmware http://updato.com/firmware-archive-select-model?record=F3096555AECD11E6B04AFA163EE8F90B

 

[OhAlfie]

Thanks for the links, do you (or anyone else) have a detailed list of installation instructions? Teach me like I'm in 3rd grade.

 

[loganbeck14]

Thanks for the links, do you (or anyone else) have a detailed list of installation instructions? Teach me like I'm in 3rd grade.

Ok first put your phone In download mode by holding down volume down+power+home until you see this

 

[loganbeck14]

Sorry, posted too soon here is what you will see while in download mode

 

[OhAlfie]

So am I downloading both those files above to my PC, or to the phone? At what point to do I put phone into Download mode??

I guess the big question, what are the odds that this bricks her phone?

thx

 

[loganbeck14]

And then in Odin you will see 4 tabs BL AP CP CSC click on the BL button next to the message box and select your downloads folder do this for the AP CP and CSC as well and click start

 

[loganbeck14]

So am I downloading both those files above to my PC, or to the phone? At what point to do I put phone into Download mode??

I guess the big question, what are the odds that this bricks her phone?

thx

The bootloader is locked so you can only brick your phone if you unplug it while it is flashing also you may have to use a modified Odin program so if you need it let me know

 

[OhAlfie]

So to confirm the steps:

First backup my phone using Samsungs software via my PC then..
Download the two files you posted earlier TO MY PC.
Open Odin and get the folders situated..
Plug in the phone to the PC and set it to Download mode
Let it do it's thing..once done I should have the full T-Mobile software and no more AT&T junk?

Sound correct..if not, please fill in any missing steps.

Much appreciated.

 

[loganbeck14]

So to confirm the steps:

First backup my phone using Samsungs software via my PC then..
Download the two files you posted earlier TO MY PC.
Open Odin and get the folders situated..
Plug in the phone to the PC and set it to Download mode
Let it do it's thing..once done I should have the full T-Mobile software and no more AT&T junk?

Sound correct..if not, please fill in any missing steps.

Much appreciated.

Right and if it doesn't connect In Odin then it won't say com with a number so also make sure you have drivers

 

[OhAlfie]

The bootloader is locked so you can only brick your phone if you unplug it while it is flashing also you may have to use a modified Odin program so if you need it let me know

Thanks, so how would I know if I need a modified Odin program??

 

[OhAlfie]

How do I make sure I have the correct drivers? Assuming I need those loaded to the PC(?) BEFORE I start all this process?

 

[loganbeck14]

Thanks, so how would I know if I need a modified Odin program??

It will say sha256 is invalid

---------- Post added at 07:23 PM ---------- Previous post was at 07:20 PM ----------

How do I make sure I have the correct drivers? Assuming I need those loaded to the PC(?) BEFORE I start all this process?

Use this link to download drivers http://developer.samsung.com/common/download/check.do?actId=698

 

[OhAlfie]

So have you done this same thing to an AT&T S7 with full success? Just wondering. My wife won't let me hear the end of it if I brick this phone. LOL

 

[OhAlfie]

It will say sha256 is invalid

---------- Post added at 07:23 PM ---------- Previous post was at 07:20 PM ----------


Use this link to download drivers http://developer.samsung.com/common/download/check.do?actId=698

Download to PC, correct?

 

[loganbeck14]

Download to PC, correct?

Yes