I have a Sprint Galaxy S8 that I paid someone online to network unlock, however it’s still running the original Sprint firmware. The device officially supports VoLTE, but in Settings->About->Status->SIM status, IMS says Not Registered, and all calls downgrade to 3G. That’s going to become a problem soon since 3G networks are being shut down where I live (outside the US).
If I flash the Samsung U1 firmware and then change the CSC to my local region (with SamFW), will that allow IMS to register and thereby enable VoLTE?
Also, I ordered a B-stock carrier-unlocked S25 (I think originally Verizon). Will I run into the same IMS/VoLTE issue with a US carrier model, and would flashing U1 + CSC change fix it the same way? I'm sure plenty of people here where I live have US carrier-unlocked Androids, will they all run into the same issue?
(A little unrelated but is there a way to check battery cycle count which withstands a reset? I want to make sure the seller is telling the truth when he says it's not used besides for someone returning it within 14 days)
Thanks
If I flash the Samsung U1 firmware and then change the CSC to my local region (with SamFW), will that allow IMS to register and thereby enable VoLTE?
Also, I ordered a B-stock carrier-unlocked S25 (I think originally Verizon). Will I run into the same IMS/VoLTE issue with a US carrier model, and would flashing U1 + CSC change fix it the same way? I'm sure plenty of people here where I live have US carrier-unlocked Androids, will they all run into the same issue?
(A little unrelated but is there a way to check battery cycle count which withstands a reset? I want to make sure the seller is telling the truth when he says it's not used besides for someone returning it within 14 days)
Thanks
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