I am having trouble with getting the native dialer to register successfully to a SIP account. I know the credentials are correct because the Grandstream Wave app is able to connect to the SIP account. https://play.google.com/store/apps/details?id=com.grandstream.wave
I don’t see how it would, but I enabled location and storage permissions for the phone (dialer) app and tried again. Still not connecting to SIP account.
Solved. The problem was with special characters in the password, maybe like % or /.
So somewhere there is unsafe handling of inputs… Secure passwords fail again (you’d be surprised how many sites handle passwords very poorly). This was affecting other SIP clients too other than the native dialer, such as Linphone, Mizudroid, Jami. Grandstream Wave is apparently more robust in this respect.
After setting a simpler alphanumeric password, there is no problem with SIP registration with any of the clients.