Make sure that both you and the person you are calling are using the latest version of Skype. If you’re not sure what version of Skype you are using, it’s easy to find out.

You or the person you are talking to may be experiencing problems due to a slow internet connection. These problems may include robotic sounds, words being cut off, or a delay in receiving audio.

You should both try closing applications that use the internet (especially those that might be playing music or video) and cancel any file downloads.

Make sure that both you and the person you are talking to have the minimum bandwidth required to make a video call.

If you are using a wireless internet connection, ensure that the network signal is strong. If it isn’t, try moving closer to the wireless router or plugging in an Ethernet cable instead.

If you have a firewall, you may need to update your firewall settings to work with Skype. These instructions can help.

For Windows, update your operating system with the latest Service Packs and updates from Windows Update. Tthe latest device drivers for your sound and video hardware are available on the device manufacturer's website.

For Mac, update Mac OS X with the latest updates from Software Update.

For the best sound quality, use a headset with a built-in microphone, and advise your friend to get a headset. Buy a headset in the Skype Shop that will dramatically improve sound quality.