Huawei U9510 hard resetTake out the SIM card. Be sure to charge your phone.
On the dial screen enter this Huawei U9510 hard reset reset code: ##258741 then press CALL button.
Warning! All your data including contacts will be lost, so back up all your data before doing a Huawei U9510 hard reset / full reset.
Upgrade will erase all your data, please backup your data before upgrade and charge your battery at least 30%
Firmware Upgrade mode Ascend D1Power off your handset. Insert the microsd card with dload/update.app folder and file in the root directory into the handset. Pressing the VOLUME UP and VOLUME DOWN keys, then press the POWER key to power on the phone, and VOLUME UP key and VOLUME DOWN key should be pressed more than 3 seconds, then enter the Software Upgrade Mode.
Press menu key to choose Settings->Storage->Software Upgrade->SD card Upgrade->Confirm->Upgrade to start the upgrade.
To check firmware build number Go to Settings --> About phone --> Build number