There are multiple reasons why you could be experiencing poor audio quality during a call.
First, check to make sure you have a good connection to the network (WiFi or 3G/4G). Your phone may be displaying multiple bars but this does not necessarily mean you have sufficient bandwidth. On a WiFi network, check to see what else might also be using bandwidth on your network (eg. streaming video).
You may wish to run a Speed Test. For acceptable audio quality Fongo requires about 1Mbps Upload and 1Mbps download speed.
You can download the Ookla Speed Test app for: iOS, Android, or from Amazon for BlackBerry
If you are using a headset or microphone to make calls, the quality of these products can also affect your sound quality.
If you are using a computer, you may experience an echo if the audio from your speaker gets picked up by your laptop.
You can make a test call to our test server by calling 226-244-4444 after a quick message the line will echo back everything that you say.
To discuss best practices please visit the Fongo User Forum for knowledge from your fellow users.