No audio after several calls until the app being restarted Zoiper 3.13, iPhone 7, ios 10.2.1

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I‘m using Zoiper 3.13, Library v2.8.30, iPhone 7, ios 10.2.1 and I have following trouble:

I set up my SIP provider ( with QR code and it works wonderful for a few calls. After several incoming (3-5) calls it doesn’t work anymore, there is absolutely no audio. No data being sent in packets when I check stats.

If I terminate app and start it again it works again. There is no difference if I use it over Wifi or 3/4G.

I also tried instructions from, but it didn’t work.

Could you help me please?

asked Apr 4, 2017 in iOS by GBccroman (120 points)  

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