Factory SIM unlock code of Doro 6520 is available, means permanent unlocking of Doro 6520 is possible using a correct NCK code. We can unlock all Doro easily by IMEI. There is no need to change the firmware to unlock it if the phone prompts for an unlock code after changing the SIM card. Unlocking of Doro 6520 by the code is the recommended method as you will not loose the warranty of the phone. It is the fastest and most secure method to unlock the phone by IMEI code. An unlocked phone can be used with all networks SIM cards around the world.
To unlock your phone, we need only 15-digits IMEI. You can find the 15-digit correct IMEI by dialing *#06# on the phone.
The unlocking of the Doro 6520 by code is a recommended method by the manufacturer. Since the unlock code comes from manufacturer database, it will unlock your phone 100%.