New answers tagged voice
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I have had a similar problem to this. In my case, it was caused by the SIM card coming loose. Try the following steps:-
Turn the phone off completely
Remove the SIM card
Reinsert the SIM card
Turn the phone on again
and then see if you can make a call and use mobile Internet. If it happens repeatedly, you might need to wedge a small piece of paper in ...
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I had the same on my galaxy 4. Eventually I called AT&T and they fixed it on their end.
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