Nokia vs Android, why such a strong difference as sip telephony?
Have Nokia E66 with the native SIP client and the Jiayu g3s which have been tried many sip clients (Internet service provider Roaming). In the first case, the connection quality is very good even on EDGE connection, the second even on wi-fi it is impossible to say. Tried native Zadarma client, csipsimple (it is) and a few others recommended on the wiki Zadarma with the recommended specs, but have not yet found a satisfactory option.
Understand that it is in the settings, but what and where? It may be that android cuts a channel or something?
Thanks in advance for the help!