SIM PIN: Microsoft Lumia 640

Learn how to lock and unlock the SIM PIN on the Microsoft Lumia 640.

 

 

Change SIM PIN

  • From the start screen, swipe left.
  • Scroll down to and tap phone.
  • Tap Menu(...).
  • Tap settings.
  • If necessary, scroll down and tap the SIM security switch to turn on.
  • Tap change SIM PIN.
  • Enter your current SIM PIN.
  • Tap enter.
  • Enter the new SIM PIN.
  • Tap enter.
  • Re-enter the new SIM PIN.
  • Tap enter.

 

Turn on / off SIM PIN

The SIM PIN code can protect your SIM from being used in other devices. When you turn on the SIM PIN lock, the device prompts you to enter the code after turning it on.

 

  1. From the start screen, swipe left.
  2. Scroll down to and tap phone.
  3. Tap Menu(...).
  4. Tap settings.
  5. Scroll down and tap the SIM security switch to turn it on or off.