In order to hard reset a BenQ-Siemens A58, you should perform the following steps.

Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
BenQ-Siemens A58 device will be brought back to the default configuration of a brand new device.


1. Power up the phone.


2. Open the dialer and type in this sequence - *#9999#
3. Phone will now restart. Done.