Selling my US unlocked S10, but I've flashed carrier firmware. - Samsung Galaxy S10 Questions & Answers

Do I need to flash back to U1 unlocked firmware? When the buyer puts their Sim card in, will my current carrier (Cricket) splash screen remain or will it recognize their carrier and change?

If it is unlocked, the buyer can use with any carrier except cdma like verizon or sprint

ryan770 said:
Do I need to flash back to U1 unlocked firmware? When the buyer puts their Sim card in, will my current carrier (Cricket) splash screen remain or will it recognize their carrier and change?
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Change back or don't advertise as unlocked firmware
Sent from my SM-G973U1 using Tapatalk

Is changing back that hard?

ryan770 said:
Do I need to flash back to U1 unlocked firmware? When the buyer puts their Sim card in, will my current carrier (Cricket) splash screen remain or will it recognize their carrier and change?
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Just flash back to U1, it is more desirable.
Actually I didn't even know why did you flash it for Cricket... An unlocked firmware works the same with them.

SoNic67 said:
Just flash back to U1, it is more desirable.
Actually I didn't even know why did you flash it for Cricket... An unlocked firmware works the same with them.
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Because it allowed me to have wifi calling with some trickery. I have basically no service in my house.

WiFi calling is not supported by Cricket... officially.
If you didn't have signal, why kept the service? Total Wireless for example uses Verizon, their reach usually is greater.
Anyway, resale value is greater with original U1 firmware.

To do what you are hoping for.... Download The newest G973U USC firmware and flash that if you're selling it in the USA.... That way it switches apps and carrier bloat when a sim is changed... Otherwise flash G973U1
XAA firmware if your selling anywhere else.
If it was a g973u1, it might not work on verizon/sprint.... If it was a g973u, it should work on both no problem. Even an AT&T S10 can be activated on Sprint or Verizon as long as the IMEI is clean and clear.

Related

Note 8 unlocked ??

Greetings,
Just received my new SM-N950U Note 8. Question is the box says it is a AT&T model but the software is T-Mobile. Baseband is N950USQS5CRK1 if it matters. Is that how it is supposed to be? I thought I was getting a factory unlocked Note 8.
Pat
The N950U is indeed the At&T model of the Note 8. However the seller may have unlocked the device so you can use any carriers SIM in it.
Branded and unlocked are two different things. You can buy a branded Note 8 which is unlocked, no issue.
It was advertised as a factory unlocked model. I just thought it would not have T-mobile software. I actually am on T-mobile so it's not a big deal I was just curious.
The unlocked model will install carrier software and splash screen by knowing what sim card you use. If you take it out and put in a different sim, it will magically change.
bobdelt said:
The unlocked model will install carrier software and splash screen by knowing what sim card you use. If you take it out and put in a different sim, it will magically change.
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You're half right. The carrier models will do that. But if you're running the unlocked U1 firmware, it will not change any boot animation, splash screen, or add carrier apps. It will provision the SIM card for that carrier, but it will remain unbranded with no bloat.
---------- Post added at 09:23 AM ---------- Previous post was at 09:19 AM ----------
patcal said:
It was advertised as a factory unlocked model. I just thought it would not have T-mobile software. I actually am on T-mobile so it's not a big deal I was just curious.
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You didn't get what you paid for. If it was advertised as "factory unlocked," and you got an ATT model that's false advertising. ATT models are carrier locked from the factory. They can be unlocked after paying them off through ATT.
They could TECHNICALLY get away with selling you a Verizon model and calling it factory unlocked, since they are unlocked from the factory, but that's still deceptive.
If you're happy, then no harm no foul. But if you really want a U1 model, then you'd have an argument for an exchange or refund.
Thanks for all the info. I am happy with the phone. It is performing as expected. I was just surprised to find the T-mobile app & boot animation when I got it. I really like it so far. My next step is do some more reading & see of I could flash a carrier free unlocked firmware. That's for another day though.
Pat
patcal said:
Thanks for all the info. I am happy with the phone. It is performing as expected. I was just surprised to find the T-mobile app & boot animation when I got it. I really like it so far. My next step is do some more reading & see of I could flash a carrier free unlocked firmware. That's for another day though.
Pat
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You can. There's a guide for doing it. But to put it simply, download the U1 firmware with the SamFirm tool. Then flash it with patched ODIN 3.13.1.

Can I flash Sprint S10+ to look like unlocked version direct from Samsung?

My dilemma. I purchased a S10+ unlocked from Samsung.com and I use it on the Sprint network. I am having data/cell problems like a lot of others are having. Samsung refuses to fix or replace the phone saying it will be fixed with an update. Sprint says they will replace my phone but it would be the Sprint version. If i do the replacement with Sprint can I later flash the U1 making it act like the unlocked version? No carrier bloat?
wraptor said:
My dilemma. I purchased a S10+ unlocked from Samsung.com and I use it on the Sprint network. I am having data/cell problems like a lot of others are having. Samsung refuses to fix or replace the phone saying it will be fixed with an update. Sprint says they will replace my phone but it would be the Sprint version. If i do the replacement with Sprint can I later flash the U1 making it act like the unlocked version? No carrier bloat?
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Service issues with T Mobile and Sprint are known. Neither have been addressed since release. As for your question, yes, it's possible to convert a U SPR to U1 XAA (and vice versa). You will lose data following the use of non Home CSCs in Odin.
You can technically preserve all data, but it's strongly recommended to follow the steps as they're written.
E: firmware is here https://forum.xda-developers.com/galaxy-s10/how-to/s10e-g973u-g973u1-firmware-links-t3905852
You can also use Samfirm and other places.
Ace42 said:
Service issues with T Mobile and Sprint are known. Neither have been addressed since release. As for your question, yes, it's possible to convert a U SPR to U1 XAA (and vice versa). You will lose data following the use of non Home CSCs in Odin.
You can technically preserve all data, but it's strongly recommended to follow the steps as they're written.
E: firmware is here https://forum.xda-developers.com/galaxy-s10/how-to/s10e-g973u-g973u1-firmware-links-t3905852
You can also use Samfirm and other places.
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Thank you for verifying this!
wraptor said:
Thank you for verifying this!
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No prob. I converted my Tmobile N8 950U to U1. Bought an unlocked U1 S10+ so no need this time around.
I have the sprint variant as well of the s10. Would flashing this sim unlock the phone?
No
kennymase said:
I have the sprint variant as well of the s10. Would flashing this sim unlock the phone?
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Nope. You're only changing the firmware on the phone, you're not unlocking anything.

[Q] AT&T unlocked on T-Mobile

I have the opportunity to pick up an AT&T unlocked S20FE, and was wondering if it is fully compatible with T-Mobile specifically for 5G/LTE Band 71?
BladeRunner said:
I have the opportunity to pick up an AT&T unlocked S20FE, and was wondering if it is fully compatible with T-Mobile specifically for 5G/LTE Band 71?
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The answer is, but you must flash the unlocked U1 firmware first and that will work or you can flash the T-Mobile firmware after.
You can stay on the unlocked firmware or flash the T-Mobile afterwards, no real difference. The only thing the AT&T version (flashed or not) won't give you is unlimited roaming on US Cellular. You need an actual T-Mobile branded phone for that.

Flashing ATT FW on S20 FE ...

I bought an unclocked S20 FE and flashed with ATT FW hoping I'd get the ATT (bloatware) allowing me to tether and get Visual Voice Mail. I do not see any of the ATT Bloat ware when I flashed SM-G781U1_ATT_G781U1UEU5DUH1 from Samfw.com. Mine is SG-781U1 (unlocked).
Any pointers would be very much appreciated. Able to get ATT SIM (5g) to work with Wifi calling and Volte but no Hotspot. When I toggle this it reverts back saying my plan does not allow it. I verified that my plan allows it and works on iPhone.
Thanks
Thats because you flashed U1 unlocked firmware that is not carrier branded. You need to flash U firmware and it will provision to your At&t sim.
butchieboy said:
Thats because you flashed U1 unlocked firmware that is not carrier branded. You need to flash U firmware and it will provision to your At&t sim.
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Can you suggest which one in the U Firmware I should use. I tried TMB and USC and no dice. I am not able to get rid of the CSC - shows as ATT/ATT/XAA - unable to get Hotspot working. I dont get any bloat ware the ATT stuff. I dont mind it but trying to flash the "U" version did not help. Appreciate any pointers
If your device is the unlocked version it will show XAA. It doesn't matter which U firmware you flash, they are all the same. The firmware will provision to whatever sim you have in device

Force device to update carrier settings SM-G781U

Hello, I'm not a developer; I've never dealt with a rooted device, but Google, Samsung, Verizon and other sources were no help, so I'm here now.
I got a Samsung S20 FE from my old workplace which was previously locked to the ATT network. I am a Verizon customer so I wanted to switch over and I purchased an unlock code from cellunlocker.net. I've reached out to Cellunlocke, but they say the unlock was successful as it is connecting to the VZW network.
I did a factory reset on the phone, put in the Verizon Sim card, and used the network unlock code provided. The unlock said it was successful, but the phone powered on with the ATT logo and downloaded all the ATT factory apps. When I go into the phone dialer settings, it shows ATT video calling, etc... The phone software version shows ATT in the service provider sw version. But it makes calls, texts, etc. and the network settings show it's connected to VZW. The problem is, that it can't access my voicemail or use wifi calling because it's set with the ATT apps and features.
I've tried removing the sim, power cycling, factory resetting, even calling Verizon and asking them to resync the phone to the network. When the sim card is installed in the new phone, VZW shows the S20 as my device, but the phone still thinks it is on the ATT settings. I've viewed the Service Menu *#0011# and it shows that the phone is unlocked.
The phone is showing a service provider software version of
SAOMC_SM-G781U_OYN_ATT_12_0012
ATT/ATT/ATT
Is there any way to force the phone to reset its carrier settings or service provider software? Also, please keep it somewhat simple; I'm learning but not an expert here!
about the only wise thing you can do is download and XAA U1 firmware (Samsung non carrier firmware) flash that with Odin and call it good.
you're getting what you're seeing because the phone won't be able to switch to Verizon firmware as Verizon actually have their own unique version of the FE SM-G781V I believe with physical differences for Verizon's mmwave 5G and the U model can't reset itself to that.
3mel said:
about the only wise thing you can do is download and XAA U1 firmware (Samsung non carrier firmware) flash that with Odin and call it good.
you're getting what you're seeing because the phone won't be able to switch to Verizon firmware as Verizon actually have their own unique version of the FE SM-G781V I believe with physical differences for Verizon's mmwave 5G and the U model can't reset itself to that.
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So which firmware version do I need? The model printed on the phone is SM-G781u. SamMobile has 781O, B, U, U1, and V for the 781 model.
I'd love to have it without the bloatware Verizon installs, but I need Wifi calling to work and it seems to be a setting in the dialer, rather than the phone.
tbrou6229 said:
So which firmware version do I need? The model printed on the phone is SM-G781u. SamMobile has 781O, B, U, U1, and V for the 781 model.
I'd love to have it without the bloatware Verizon installs, but I need Wifi calling to work and it seems to be a setting in the dialer, rather than the phone.
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flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
3mel said:
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
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Ok thank you, I'll give it a shot
3mel said:
flashing V would be a bad idea, 5G wouldn't work, at least not well. so that leaves U1 which is Samsung unbranded, no carrier apps at all.
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I'm looking at the instructions for flashing the device and the instructions say to turn on OEM Unlocking in developer options. I've activated developer options and USB debugging, but do not have the option to turn on OEM Unlocking.
I can't seem to find a way to unlock the bootloader.
tbrou6229 said:
I'm looking at the instructions for flashing the device and the instructions say to turn on OEM Unlocking in developer options. I've activated developer options and USB debugging, but do not have the option to turn on OEM Unlocking.
I can't seem to find a way to unlock the bootloader.
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to the best of my knowledge you don't need to be unlocked in order to flash signed, official Samsung firmware. many Americans have cross-flashed their phones and none of them could unlock either.
you're just booting into download and opening Odin, it's not much more than that.
3mel said:
to the best of my knowledge you don't need to be unlocked in order to flash signed, official Samsung firmware. many Americans have cross-flashed their phones and none of them could unlock either.
you're just booting into download and opening Odin, it's not much more than that.
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Awesome, a flash using ODIN seems to have worked; the phone is active and not showing any carrier apps or splash screen. I'm having some other issues; can you suggest which firmware combo would be best?
I used Sammobile.com SM-G781U1 with Country Code USA (Verizon) (VZW)
OR I also downloaded Frija SM-G781U1 with CSC of XAA
Will I notice any major differences in them, or just try each one and check it out?
I am in the US, using the Verizon network. We do not have 5g in the area but the phone and our verizon plan is 5G capable and I would like the option if it exists somewhere I travel to.
I am in the UK, I shouldn't be telling you anything about what firmware is gonna be best over there.
other than U1 XAA I can't tell you much. also be aware that generally you can never downgrade your firmware unless it has the same bootloader version as what you're currently using...
if we were looking at my firmware version number G781BXXU4FVE6
I can only flash something that has a matching 5th last character, that's a 4 in this case. I can only download and flash older firmware if it also has a 4 in the same place in the build number. the phone won't accept anything else.
Sammobile is good for seeing what firmware exists but it's terrible for download speeds. I use Frija mainly but that only gives me the latest version nothing historical.
@3mel thank you for all your help! I've got this device working well on the U1 software and didn't have to reflash it; the rest of my issues resolved. Thanks for your patience in helping this newbie do things to a phone I never would have attempted otherwise!

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