Why can’t I receive calls?

Try changing the SIP proxy setting (Menu >> Tools >> Settings >>
Connection >> SIP Settings >> Aql >> Proxy server) transport type to UDP
and port to 5060.

If your phone doesn't register, then there's a possibility that your
router doesn’t do NAT properly and you therefore can’t receieve calls.
However, you can still make cheaper outbound calls over VoIP.

Please remember that your mobile caller ID (i.e. your mobile phone
number in the form 447xxxxxxxxx) is presented on VoIP calls.

More help available from technicians via our online support system.