1.Turn off phone
2.Press Volume UP Call Button then press Power

To Reset from Menu

1.Press menu Key
2.Select Privacy
3.Select Factory Date Reset
4.Select Reset Phone
5.Select Erase eVERYTHING

How to Hard Reset Huawei U8300

https://i1.wp.com/droid-developers.com/wp-content/uploads/2017/01/fo3g5f.jpg?fit=139%2C184https://i2.wp.com/droid-developers.com/wp-content/uploads/2017/01/fo3g5f.jpg?resize=139%2C150Fahim MahmudHelp & TroubleshootingHow ToHard Reset1.Turn off phone 2.Press Volume UP Call Button then press Power To Reset from Menu 1.Press menu Key 2.Select Privacy 3.Select Factory Date Reset 4.Select Reset Phone 5.Select Erase eVERYTHING How to Hard Reset Huawei U8300Android Help,Troubleshooting  & Stock Rom