In order to hard reset a BenQ-Siemens EF61, 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 EF61 device will be brought back to the default configuration of a brand new device.
1. Turn on the phone.
2. Open dialer; in it, type down this sequence *#9999#
3. Confirm it with a Call key