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I configured my mobile phone with VoIP settings but I can't register or I can't make calls even when it is registered. What is the problem?

If you cannot register or cannot make/receive calls with your mobile phone VoIP feature, you are probably behind firewall. Your router's firewall (also known as NAT) is blocking certain operations of the VoIP features of your mobile phone.

Before trying to resolve this issue on your router, try the following solutions on your mobile phone VoIP configuration. Please make changes one at a time and reboot your device each time you make a change, in order to to see if the problem is solved.

1.) IMPORTANT Please make sure you have the latest firmware for your mobile phone. Firmware is the software on your mobile phone and make sure to backup your data before upgrading the firmware, to be on the safe side. Most VoIP issues are resolved by mobile phone firmware upgrade. For detailed instructions consult your mobile phone's user guide and the manufacturer's web site.

2.) Make sure again you entered all VoIP settings including your account number, password and VoIPVoIP server domain name correctly. It is important that same wireless LAN connection name is chosen at "SIP Settings/Access Point" with the one you are using to connect to Internet with your mobile phone.

3.) If your device is registered to our servers but you still cannot make calls, delete SIP profile and configure the SIP profile again using IP address of our SIP server 69.90.209.57 instead of the domain name sip3.voipvoip.com. Click here for detailed instructions.

4.) You can also use your VoIPVoIP account with your mobile phone downloading free software Fring. Please click here to find more about Fring.

5.) If non of the above solutions work, in order to confirm that your VoIPVoIP account is working in the same network with another device, download our free softphone to your PC.

To try your VoIPVoIP account with your PC;

- Download the PC to Phone software from clicking this link.

- Install it on your computer. Open the application and configure according to your account settings using our configuration guide here. If you cannot register with your PC phone click here.

If you can register with your PC Phone and make calls in the same network, and if you can connect to Internet with your mobile phone using the same network, please enter again VoIP configuration settings of your mobile phone. Reboot your device and check if you are registered.

If you still cannot make VoIP feature work with your mobile phone, this is due to your router's firewall (also known as NAT) blocking certain operations of your mobile phone VoIP feature.

In this case, click here to solve firewall NAT issues on your router.