I have looked through the user manual for the Huawei G7220, but I cannot see how you change the setting. The phone originally had sound but now only vibrate with the vibrate symbol on screen. A simple fix I am sure if you know how. Please help as the phone belongs to my special needs daughter.
In your homescreen, simply press the volume up key.
Please test if it works by calling your phone. Let me know how it goes.