how to call other SIP user?
Please correct me if I am wrong, my understanding is that I can receive calls via my SIP URI or SIP Broker which can be found under Manage DID(s) for DID numbers that I have.
But how I am able to make an outgoing SIP URI call from a phone (not computer) if I knew other people's SIP URI? (it contains letters rather than just numbers)
Have you tried to put the SIP URI in your phone book with a Speed Dial?
yep, that's what I thought, and also tried but seems my phone doesn't support non-numerical input in the phone number screen......