Connection issues (Wi-Fi, GSM)

Connection issues (Wi-Fi, GSM)

Hello,

I have a very strange problem. When I turn on the WWII application after a while my internet is disconnects - no difference Wi-Fi, GSM. At first I thought it was a problem with android or sim card so I restored the phone factory default, but problem is not disappear. If it was a problem to GSM internet only that could be a sim card problem - but Wi-Fi connection have same problem. It could be a problem with the modem so I was thinking about sending my phone to the service, but I noticed that when I'm not using the WW II application problem does not occur.

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:

Thank you.