Mobile data is not available or invalid SIM on unlocked SGH-i747
I have an unlocked SGH-i747 I got last week. Today I tried to enable USB tethering, but I got the message "Mobile data is not available or invalid SIM"; same thing happens if I try to enable Portable Wi-Fi hotspot.
żAny solution to this? I know I will probably have to root the phone, that's no problem.
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