Core4voIP Dialer OP: 1001
For All Countries(OMAN/KSA/QUATAR)
Android:N.B: Must change your Symbian mobile date to 18/08/2015 or before than this date, otherwise it will prevent Symbian dialer from getting installed due to certificate expired error.
If you have any firewall please allow below IPs:
184.108.40.206 to 215
220.127.116.11 to 174
18.104.22.168 to 6
22.214.171.124 to 14