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Hello.
I've just bought my new Umi super and some days ago it started with a problem when I got calls and when I try to listen to wahtsapp audio... the screen turns black and I cannot see who is calling or even listen to the audio (app).
I've tryed to restart it to default system several times... turned off the sensibility sensor... but none of them worked out.
The android version is 6.0 today and the mobile is new... Could someone help me pls?
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