Hard Reset SIEMENS ST55

How to factory reset SIEMENS ST55? How to wipe all data in SIEMENS ST55? How to bypass screen lock in SIEMENS ST55? How to restore defaults in SIEMENS ST55?

The following tutorial shows all method of master reset SIEMENS ST55. Check out how to accomplish Hard Reset by hardware keys and Vendor settings. As a result your SIEMENS ST55 will be as new and your core will run faster.

  1. Press Power button, until your phone is on.
    Remove Screen Lock on SIEMENS ST55
  2. Next press this in sequence: *#9999#
  3. Wait until your phone will reboots.

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Hard Reset will erase all of your data.
All described operations you are doing at your own risk.
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