Mostly happy
Softphone works well, the sound quality is great (depends on the other party’s phone and codec settings) and rings out every time no matter it’s 4g or wifi connection on the smartphone. Unfortunately to build up the call sometimes fails mostly (always) on 4G network but it depends how busy mast you connected to. I found that busy areas with loads of traffic makes the calls less successful to build up but same providers network but less busy area will leading mostly successful call establishing. I’ve tried using vpn on my mobile phone and found that it helps a lot. After 10 test calls from the app in busy area on 4G,no success calls, but using vpn (nord) with uk server 80% successfully build calls. So the mobile network can be the reason of the unsuccessful calls/no sound/ “waiting for the other party peer connection” or endless “connecting “ messages. On wifi, calls all the time were successful and good/perfect quality.