Flashing S8 To Another Carrier? - Samsung Galaxy S8 Questions and Answers

Anyone have luck flashing the S8-950U US version to another carrier? I'm trying to flash my Verizon S8 to the T-Mobile Firmware but get an error at 32% on my phone when it says system is updating. Also, when I just flash the AP and CP files, I get bloatware from Cricket, Verizon, T-Mobile, and Metro PCS with 3 different software updates and a messed up settings app.

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Will an S7 Edge (T-Mobile) work on Verizon?

Hello all,
I want to switch to Verizon but I don't have a verizon sim to test my phone, I just got it unlocked through the unlock app. I've also read this post,
https://forum.xda-developers.com/tm...izon-galaxy-s7-edge-t-mobile-network-t3399618
but there is no confirmation if he found a solution.
any feed back would help.
Well i live in Mexico, but i own a galaxy s7 edge from tmobile and to try nougat i installed first the Verizon version, and it work well, the only issue was to setting the data configuration, now i use the At&t nougat and everything still even more perfect (the verizon nougat have a lot of little bugs)
bounddyy said:
Hello all,
I want to switch to Verizon but I don't have a verizon sim to test my phone, I just got it unlocked through the unlock app. I've also read this post,
https://forum.xda-developers.com/tm...izon-galaxy-s7-edge-t-mobile-network-t3399618
but there is no confirmation if he found a solution.
any feed back would help.
Click to expand...
Click to collapse
Using a Tmobile S7 Edge going to Verizon won't work cause of a few reasons.
1. TMOBILE S7 and S7 edge are not built for CDMA networks that uses certain bands and network. Along with the security of CDMA networks.
2. There is no band 13 on tmobiles S7 and S7 Edge. Even you were to unlock it.
But going from CDMA to GSM most phones work due most of the hardware and software is already built in the phone.
Sent from my SM-G935T using XDA-Developers Legacy app
I can confirm this. Yes, your unlocked T-mobile S7/Edge will work with Verizon network if you flash the U firmware. I'm currently using my unlocked T-mobile S7 Edge with the U-firmware on the Verizon network. Voice, text, data work fine. No issues for me.
bounddyy said:
Hello all,
I want to switch to Verizon but I don't have a verizon sim to test my phone, I just got it unlocked through the unlock app. I've also read this post,
https://forum.xda-developers.com/tm...izon-galaxy-s7-edge-t-mobile-network-t3399618
but there is no confirmation if he found a solution.
any feed back would help.
Click to expand...
Click to collapse
You can flash the stock Tmobile ROM or the U firmware. The only reason I got a new S7 when I jumped from big red was I had a huge scratch on my screen. I was running the U firmware when I went into tmobile and used the girls sim card from her phone to prove I could do it...
Sent from my SM-G935T using XDA Premium HD app
Don't know but I am on T-Mobile and I use alot from Verizon thread no issues so far
OK, so I have a question. I'm also trying to move from t-mobile to Verizon but I'm trying to keep my same phone. My phone is already paid off and i currently running t-mobile's SM-G935U over SM-G935T. But a couple of days ago i asked a friend to let me barrow his verizon sim card to test it out. But received a message saying "Invalid sim Card" "network locked SIM card inserted." Did i messed up something during the installation of the SM-G935U?
edgtv said:
OK, so I have a question. I'm also trying to move from t-mobile to Verizon but I'm trying to keep my same phone. My phone is already paid off and i currently running t-mobile's SM-G935U over SM-G935T. But a couple of days ago i asked a friend to let me barrow his verizon sim card to test it out. But received a message saying "Invalid sim Card" "network locked SIM card inserted." Did i messed up something during the installation of the SM-G935U?
Click to expand...
Click to collapse
You need to UNLOCK your phone. It might be a Tmobile phone and running G935U software...but the sim is still locked to T-Mobile. Here is Tmobile unlock page information. you can request unlock in the T-mobile app or by calling T-Mobile....then it should see the Verizon sim and load up just fine once the phone itself is not locked to T-Mobile only sims. https://support.t-mobile.com/docs/DOC-1588
And for anyone else looking at this forum, There is no physical difference in hardware from a SM-G935T phone and a SM-G935U phone. Samsung actually made the hardware the same for all US Variants it is just the software that is different. And not that you would want too but you could load other carriers software on your phone if you wanted too(IE- running Verizon software on a SM-G935T, or ATT or SM-G935U (Stock Samsung Software) The only problem Running SM-G935U is they haven't upgraded the unlocked us phones to 7.0 yet. Where T-Mobile and other carriers already have nougat out.
The SM-G935U software however has all the US and even some Chinese LTE bandwidths enabled, and it also enabled the CDMA bandwidths to be used on the SM-G935 phones...hence why it will work with Verizon, Sprint, and even US Cellular if you can get them to put it on the account.*(I haven't dealt with US Cellular in years and with the new laws on moving phones from carrier to carrier in the US they might not have any issue with Bring your own phone to US Cellular anymore I do not know!)
lubu81 said:
I can confirm this. Yes, your unlocked T-mobile S7/Edge will work with Verizon network if you flash the U firmware. I'm currently using my unlocked T-mobile S7 Edge with the U-firmware on the Verizon network. Voice, text, data work fine. No issues for me.
Click to expand...
Click to collapse
lubu81 is there a step by step process to unlock and setup/flash/install phone completely to be able to use with Verizon?
cchavez136 said:
lubu81 is there a step by step process to unlock and setup/flash/install phone completely to be able to use with Verizon?
Click to expand...
Click to collapse
Had you flash any ROM before via Odin?. If so, you will only need to download the verizon firmware (sammobile.com) and flash those files. if not > Open odin (Attached) load all the files accordingly (AP, BL, CP, CSC) in ODIN> put your phone download mode ( pressing fingerprint button + volume down + power) > connect phone to PC > Once all files are ready in ODIN hit start. You will get the success message and phone will boot.
Mr. Clown said:
Had you flash any ROM before via Odin?. If so, you will only need to download the verizon firmware (sammobile.com) and flash those files. if not > Open odin (Attached) load all the files accordingly (AP, BL, CP, CSC) in ODIN> put your phone download mode ( pressing fingerprint button + volume down + power) > connect phone to PC > Once all files are ready in ODIN hit start. You will get the success message and phone will boot.
Click to expand...
Click to collapse
Thank you so much,. when i try to load i get the below message
OSM all threads completed (succeed 0/failed 0)
cchavez136 said:
Thank you so much,. when i try to load i get the below message
OSM all threads completed (succeed 0/failed 0)
Click to expand...
Click to collapse
Exit completely ODIN (make sure you run it as administrator), repeat the process and make sure all files are uploaded (AP takes a long time to upload) make sure to use the CSC file label as HOME_CSC. Try to flash again.
Mr. Clown said:
Exit completely ODIN (make sure you run it as administrator), repeat the process and make sure all files are uploaded (AP takes a long time to upload) make sure to use the CSC file label as HOME_CSC. Try to flash again.
Click to expand...
Click to collapse
Does the phone have to be unlocked before adding these files or does it matter?
cchavez136 said:
Does the phone have to be unlocked before adding these files or does it matter?
Click to expand...
Click to collapse
If you are going to use a verizon sim, you will need to have it unlocked. Firmware flash won't sim unlock/lock the phone.
Mr. Clown said:
Exit completely ODIN (make sure you run it as administrator), repeat the process and make sure all files are uploaded (AP takes a long time to upload) make sure to use the CSC file label as HOME_CSC. Try to flash again.
Click to expand...
Click to collapse
i flashed the rom. afterwards i got an error message with a dead android. after about 5 min it takes me to android recover menu with a log in white that shows a lot of E: failed messages. what do i do now?
unknownsupervillain said:
i flashed the rom. afterwards i got an error message with a dead android. after about 5 min it takes me to android recover menu with a log in white that shows a lot of E: failed messages. what do i do now?
Click to expand...
Click to collapse
Ok, which ROM did you flash and what version of android you previously had in your phone?
Mr. Clown said:
Ok, which ROM did you flash and what version of android you previously had in your phone?
Click to expand...
Click to collapse
Thanks for the quick reply. I thought I was gonna be waiting months. I got it tho. The home csc file wasn't working so I used the other one that reset the phone to stock. It was g935u firmware for tracfone from T-Mobile if that helps anyone in the future.
unknownsupervillain said:
Thanks for the quick reply. I thought I was gonna be waiting months. I got it tho. The home csc file wasn't working so I used the other one that reset the phone to stock. It was g935u firmware for tracfone from T-Mobile if that helps anyone in the future.
Click to expand...
Click to collapse
Great it worked.
I flashed the tracfone rom and everything is working well. I got a software update notification. Should ignore it or is it ok to update?
Bumping the thread...sorry guys. I just jumped ship from Verizon and went to Tmobile today with my S7 Edge along with my wifes S7 Edge. Can I flash her phone with the U firm from TMobile and is the U firmware from tmobile the same U firm that is provided to Verizon? Jist wondering. I've used Odin plenty and understand flash process.

S8 on Cricket

I have a G950U from VZW, flashed with G950U1 firmware, I am switching to Cricket and wonder if there is a way to enable volte, wifi calling and visual voicemail from samsung dialer, would it do installing ATT user data? I don't wanna install complete ATT firmware as I don't want bloatware
up
Yea, Install the user data and that'll work. Volte will be working but Wi-Fi calling isn't. Visual voicemail is also working.
Will I get OTA updates flashing ATT user data?
Also where would I put user data in Odin, in the CSC field?
underground9 said:
Will I get OTA updates flashing ATT user data?
Also where would I put user data in Odin, in the CSC field?
Click to expand...
Click to collapse
It's a user data file, there is a thread about switching carriers that tells where to put the userdata file. And no you won't get ota updates. Only downside.

Flashing a differenct CSC rom and keeping data

Currently on Snapdragon latest official Oreo with XAS (unbranded Sprint)
My phone was an originally Verizon branded, it now has XAS U1 firmware (model shows as U1 in settings)
I want to flash either U1 or U of ROM with csc of SPR. The reason I want to do this is because I want to fix/enable Calling Plus/Wi-fi settings.
I really do not care if my csc says XPR or SPR afterwards, I'm just thinking that flashing a rom designated as SPR might fix my Calling Plus/Wi-fi issues.
Is it possible when using Odin to flash, to use Home CSC and not wipe data.? I still feel with unrooted phone backup and restore still requires a lot of manual setup and I hate constantly doing this every time I flash.
Note: I've already tried to get wifi calling working using both Nova activities and in the phone settings without success , have been following the other thread about enabling Calling Plus on unbranded rom
After throwing in a T-Mobile sim and then going back to Sprint sim, I was converted to SPR csc. Sprint always seems to do this. So now I don't need to change CSC b ut I still am struggling to get wifi calling
The firmware for SPR and XAS appear to be identical so I am wondering if I should try to flash the U version of the rom . And of course attempting to keep data

Missing LTE network bands on Verizon S7 running Oreo

Is it possible to modify which network bands a device communicates with by using only an app? And can that modification be permanent enough that flashing stock firmware through Odin doesn't restore it?
I got a bit carried away and was trying to get my Verizon S7 to become a strictly an At&t variant forcing it to register on GSM. Really, I have no clue what I was attempting, but now it takes several attempts to send text messages before they actually send. No problems with anything else except sending SMS. Before it will send, the phone will switch from 4G XLTE to N/A, then back again. I've tried different messaging apps, different SIM cards for Verizon and Cricket, and I've flashed multiple stock firmware all with the same results. My SIM cards in other devices work fine, but I've screwed this S7 up enough that its driving me crazy. Any help would be greatly appreciated. Thanks.
Did you try flashing the U firmware over the V phone? It worked for me.
Don't flash the AT&T one - not sure about Oreo, but the Nougat version of AT&T has a different boatloader (5) and it cannot be downgraded later to the 4 of the other versions.
See more here :
https://forum.xda-developers.com/showpost.php?p=77337625&postcount=3

Flashing home_csc file

I used odin a while back to get SM-G935U on my originally AT&T bloated firmware. I'm currently trying to enable t-mobile's volte and wifi calling, so I've been trying to flash the home_csc file for : TMB-G935TUVS9CSC1 . This should be the newest update for t-mobile's firmware.. However, I still cannot seem to see either features. Do I need to do something else for those two features to show up?

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