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Idk why but I lose my internet when Im on the phone wit someone. N I get calls wen I'm using my phone to downloading something
You would bed a GSM phone for that which only AT&T and T mobile have. Best advice is to go into contacts and set whoever you think is going to call straight to vmail. Also you could try root call blocker app.

i think they want a way to be able to use phone and surf at same time