[Snap. +] Guide for Flashing Standard FW, Carrier Switching, and Flashing Unlocked FW

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DruoGaby

Senior Member
May 31, 2013
783
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Jul 8, 2017 at 2:22 PM
sprint got an update today for nav bar giding and lte roaming improvements...ending in QFJ..nothing on unlocked yet unless we have to update manually?
 
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Mike15678

Senior Member
Jun 18, 2017
253
190
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Jul 8, 2017 at 6:26 PM
DruoGaby said:
sprint got an update today for nav bar giding and lte roaming improvements...ending in QFJ..nothing on unlocked yet unless we have to update manually?
Click to expand...
Like I said, Samsung tries to keep up with other carriers for their unlocked firmware, but don't expect them to push an OTA immediately after one carrier pushes it.
 
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MonsterAndroid

Member
Oct 25, 2011
12
1
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Jul 10, 2017 at 6:47 PM
Androiddude101101 said:
I followed every step completly and flashed the tmobile version.


How can I know if I have 4x4 mimo and all tmobile features now?
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I was wondering the same exact thing. I tried a few different things but none seemed to give me the results I wanted. I think it possible with root.

This was one of the main reasons I flashed my G950U1 to the T-Mobile variant G950U. 4x4 MIMO & 256 QAM. HD Voice and WIFI calling seems to work. Haven't checked VOLTE yet.
 
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bcool15

Senior Member
May 7, 2010
240
14
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Jul 10, 2017 at 8:14 PM
Two Sprint devices s8+
One flashed to Verizon Rom
Volte seems to not work i just tried it being on call tried surfing internet it stuck on loading until I disconnected call.
eventhough lte icon doesnt disappear as it should if no internet is connected

Can't send texts
I can receive texts and send mms only
(Picture)

Other device yet to test on T-Mobile Rom with Tmo sim

Since my sms has broken and no volte I'll try unlocked version Rom

My devices are sim unlocked, used eBay service...
 
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Mike15678

Senior Member
Jun 18, 2017
253
190
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Jul 11, 2017 at 1:38 AM
bcool15 said:
Two Sprint devices s8+
One flashed to Verizon Rom
Volte seems to not work i just tried it being on call tried surfing internet it stuck on loading until I disconnected call.
eventhough lte icon doesnt disappear as it should if no internet is connected

Can't send texts
I can receive texts and send mms only
(Picture)

Other device yet to test on T-Mobile Rom with Tmo sim

Since my sms has broken and no volte I'll try unlocked version Rom

My devices are sim unlocked, used eBay service...
Click to expand...
Did you first change your CSC to "VZW", before you followed the "Flashing Standard Firmware" section? You have to follow the "Carrier Switching" section, in order to change your CSC. And if that's not the issue, did you make sure that you flashed the "CSC" file instead of the "HOME_CSC" file in the "CSC" box and flash the "USERDATA" file in the "UMS" box in Odin, in addition to the other required files, if you followed the "Standard Firmware" section. And lastly, if this is a Verizon SIM card from another device, that won't work; you're going to have to follow: https://www.verizonwireless.com/bring-your-own-device/. If none of these suggestions work/help, try flashing the unlocked firmware by following the "Flashing Unlocked Firmware" section and then flash the Verizon "USERDATA" file in the "UMS" box to get access to Verizon features.
 
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bcool15

Senior Member
May 7, 2010
240
14
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Jul 11, 2017 at 2:00 AM
I followed the guide on page 1 post 1 to the letter, proudly ;)
Flashed unlocked version and everything so far VOLTE texts mms working good on Verizon's network


I have yet to test Tmo rom with its sim I'll post updates

Also if someone has z3x box I can show how to sim unlock for free sprint s8+ provided they offer free service later
 
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lasttwo

New member
Jul 12, 2017
2
0
0
Jul 12, 2017 at 9:10 PM
Been trying to days to get tmobile firmware working on a sprint unlocked sprint phone. Tried the U and the U1,. It will not for anything register to tmobile network.
it is currently showing TMB/TMB/SPR under about device and CSC = TMB.

How do i revert this thing back to Sprint?? just re-do the carrier unlock section and change it back to SPR from TMB?
 
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Mike15678

Senior Member
Jun 18, 2017
253
190
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Jul 12, 2017 at 10:02 PM
Duffmantp said:
Did you find the UMS file for ATT? Thats what i was looking for. My CSC is already ATT but im looking to get VoLTE and Wifi Calling without ATT Bloatware. I was going to try just the flashing UMS file and not everything else.
Click to expand...
The "UMS" file is the "USERDATA" file found in the firmware archive. If not present, then your download was corrupted and you would need to re-download it. If already on Unlocked Firmware, flash the "USERDATA" file in the "UMS" box in Odin to get access to carrier-specific features, such as Wifi Calling and VOLTE. I'm pretty sure you still get bloatware, though.
 
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Mike15678

Senior Member
Jun 18, 2017
253
190
0
Jul 12, 2017 at 10:11 PM
lasttwo said:
Been trying to days to get tmobile firmware working on a sprint unlocked sprint phone. Tried the U and the U1,. It will not for anything register to tmobile network.
it is currently showing TMB/TMB/SPR under about device and CSC = TMB.

How do i revert this thing back to Sprint?? just re-do the carrier unlock section and change it back to SPR from TMB?
Click to expand...
To avoid confusion, you're not unlocking your phone's SIM card for use with other carriers when you follow the "Switching Carriers" section; if you want to switch carriers you must first be SIM-card unlocked through your carrier or a third party service. The "Switching Carriers" section only shows how you change the CSC code of your phone, in order to properly flash firmware of your choosing. Your CSC sequence: "TMB/TMB/SPR" is good, as the last three characters are permanently hard-wired onto your phone.
If you want to flash back, follow the "Carrier Switching" section to change your CSC code to "SPR" and then follow the "Flashing Standard Firmware" section.
 
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lasttwo

New member
Jul 12, 2017
2
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Jul 12, 2017 at 10:29 PM
Mike15678 said:
To avoid confusion, you're not unlocking your phone's SIM card for use with other carriers when you follow the "Switching Carriers" section; if you want to switch carriers you must first be SIM-card unlocked through your carrier or a third party service. The "Switching Carriers" section only shows how you change the CSC code of your phone, in order to properly flash firmware of your choosing. Your CSC sequence: "TMB/TMB/SPR" is good, as the last three characters are permanently hard-wired onto your phone.
If you want to flash back, follow the "Carrier Switching" section to change your CSC code to "SPR" and then follow the "Flashing Standard Firmware" section.
Click to expand...
This phone was a carrier unlocked Sprint S8+ and was working with tmoble before i tried the flash. I just wanted to flash to get wifi calling since there are some dead spots i visit. Thanks, i will flash it back to spr, hopefully i can get service again. :)
 
Duffmantp

Duffmantp

Senior Member
Jun 26, 2011
280
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Jul 12, 2017 at 10:33 PM
AxlxA said:
http://updato.com/firmware-archive-select-model?record=6032047A52D711E7963AFA163EE8F90B

that's the one i downloaded. It contains no USERDATA file. Also it's 2.88gb
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Mike15678 said:
The "UMS" file is the "USERDATA" file found in the firmware archive. If not present, then your download was corrupted and you would need to re-download it. If already on Unlocked Firmware, flash the "USERDATA" file in the "UMS" box in Odin to get access to carrier-specific features, such as Wifi Calling and VOLTE. I'm pretty sure you still get bloatware, though.
Click to expand...
I have downloaded updato. I downloaded May and June release of USA (ATT) 2x, and each zip contained all the other files but USERDATA
 
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