First check your username and password are correct. If you forgot your password, click on the "Forgot Password".
If your username and password are correct, you may not have a working internet connection. Make sure you are connected to the internet.
Check you firewall settings too. Some firewalls may try to block MO-Call PC from accessing the internet.
If you still can't log in to MO-Call PC, contact Customer Care for more assistance.

Make sure you have a working headset or headphones that are correctly installed and connected to your PC.
Check your speaker volume settings are turned up and make sure you haven't set it to "mute"
If the other person is using MO-Call PC, make sure they have turned up their mic volume.

Make sure you have a working headset or mic that is correctly installed and connected to your PC.
Check your mic volume settings are turned up and make sure you haven't set it to "mute".
If the other person is using MO-Call PC, make sure they have turned up their speaker volume.

If either of you have a slow internet connection, you may experience voice distortion.
We recommend that both of you have a connection speed of at least 128 Kb/s. The higher the connection speed, the higher the call quality.
We also recommend that both of you turn off any downloads, streaming music or streaming video whilst making your call.

Contact Customer Care. We're always online to solve your problems and issues.