vibration mode: After a while, the phone raised the volume to a minimum ...

[javig]

Under the volume to the minimum, happening to vibration. After a while, the phone raised the volume to a minimum ...
will it be a virus? I passed after upgrading to 7.1.1.

[CameronT]

Hi @javig, Welcome to the community. I am sorry to hear about this  

Do you experience the same issue in  safe mode?

[najodleglejszy]

it could be that you accidentally pressed a volume button, which adjusts ringtone volume by default.

[CameronT]

That's a good point @najodleglejszy.

@javig, do you have a case on your phone?

[javig · Accepted solution]

I uninstalled some applications and it was fixed. I guess it was a classic arcade game.

[CameronT]

Glad to hear you got it working Thank you for letting us know.