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How to master reset Siemens CT66
Reset instructions for Siemens CT66


Steps to Reset Phone

Restoring factory settings may erase any personalized settings, use with caution.


  1. From the standby screen, enter *#9999# then press Send.
  2. Select OK.
  3. Select Yes to confirm the reset of all default settings.


Warning!: While reset/restore operation under process, you are advised not to remove your battery until the operation is completed and cellphone restarts otherwise phone damage may occur.
*Disclaimer:Performing a master clear/master reset/hard reset will erase all your data (photos,videos,contacts etc) completely and reset all the settings to Factory default. The information contained in this website is for general information purposes only.In no event will be liable for any loss or damage including without limitation, indirect or consequential loss or damage. For complete disclaimer notice please visit Disclaimer. The brand names are the registered trademark of respective manufacturers.