Question S21 FE G990U2 to U1

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Hello. I bought s21 fe but the strange thing that it's u2 model comes with binary 2 out of box and stuck at android 12 . Can I flash u1 model on it ?
 

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G990U2 and SM-G990U3 : S21 FE variants with support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging.
so i think you can only flash G990U3 firmware ( U1 is without support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging )
G990U2 and G990U3 I'm totally confused with the model number because I have seen U and U1 model only . Actually my phone Is locked on t-mobile and the unlock price is high for binary 2 . It comes in binary 2 out of box . Is there any way to downgrade it to u3 or u2 binary 1
 
G990U2 and SM-G990U3 : S21 FE variants with support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging.
so i think you can only flash G990U3 firmware ( U1 is without support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging )
I just flashed U3 on my G990U2 and now it has 2 imei both physical imei not esim but both imei are same . Can I use dual sim in it ? I don't have dual sim tray
 

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joe4801

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Feb 15, 2015
7
2
its fixed.I don't why at G990BU3/XAA my tmobile sim card have signal bar but no service, other sim work fine.so I flash my phone to G990U2 VERIZON, now my tmobile sim card work, thanks
hi
I have the same problem can you please
its fixed.I don't why at G990BU3/XAA my tmobile sim card have signal bar but no service, other sim work fine.so I flash my phone to G990U2 VERIZON, now my tmobile sim card work, thanks
Hello
I have the same problem, I had metro PCs phone, I fully unlocked but the T-Mobile Sim didn't work, what Verizon firmware did you used? I been trying a lot of firmwares but I have error sha256 is invalid
Where you get the Verizon firmware G990u2 and how did you flash it?
Thank you
 
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joe4801

Member
Feb 15, 2015
7
2
Can someone please point me to the right firmware to use , this one doesn't take TMobile Sim
Thank you
 

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  • 2
    the shopkeeper says the imei which is added to it is non pta and the sim can work on it for 2 months i can approve the imei by paying its tax which 660 ruppes I am just concerned that if I flash it with u1 firmware sim might not work i never flashed a cpid phone that's why i am not sure what to do in this regard.
    btw thanks for your quick response
    He is wrong you can flash u or u1 firmware on it and nothing will happen
    2

    I have flash my METROPCS G990U2 to G990U3,other sim card work fine,but t mobile sim card does not work ,can someone help me?I already change CSC to xxa,but still no internet,I do have sginal bar​

    1
    G990U2 and SM-G990U3 : S21 FE variants with support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging.
    so i think you can only flash G990U3 firmware ( U1 is without support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging )
    1
    G990U2 and SM-G990U3 : S21 FE variants with support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging.
    so i think you can only flash G990U3 firmware ( U1 is without support for NFC, Bluetooth 5.0, dual-band Wifi and Wireless Charging )
    I just flashed U3 on my G990U2 and now it has 2 imei both physical imei not esim but both imei are same . Can I use dual sim in it ? I don't have dual sim tray
    1
    i think you can't use dual SIM ( same IMEI )
    It working . Both sim are working without any issue