Same happens to me, but only with the play store. What I do is close the app and restart the phone and it works. But every time I want to use I have to do the same... Google maps used to have the same problem but it stopped I don't know how......
What will be a good app to do a backup and reset? When I changed to the G4 I used back up your mobile. But I didn't like it, it mixed up the picture dates and had a hard time with the contacts.
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