My daughter has a prepaid service and I casually try her SIM card in HTC ONE I have. I am out of contract and Sprint even gave me the unlock code if I have to change carrier. I expected HTC ONE to prompt me for an unlock code. But guess what ? I get the
error and I am not able to do anything.
Last evening I then casually walked to T Mobile store and tried a T Mobile SIM card. I get the same error message. What is going on? I checked and have the latest HTC software 6.23.651.6. I need help immediately.
Hello! We'll be more than happy to assist you with this issue. Please reply to the Private Message I sent you.
Sprint Social Care
mbuvi, are you trying to insert a SIM card from another carrier on the Sprint device? Is that phone the HTC EVO?