Learn how to use the Mobile Device Unlock code of the LG Optimus L90.

SIM unlock phone

  1. Determine if devices are eligible to be unlocked: Mobile Wireless Device Unlocking.
  2. Contact Customer Care to request the Mobile Device Unlock code for your phone.
  3. Insert a Non-T-Mobile SIM & turn the phone on.
  4. Once the device is powered on, the screen should display 'Invalid SIM card Network lock.'
  5. From any Home screen, tap Phone.
  6. Enter 2945#*769#.
  7. If necessary, tap Service Provider Lock.
  8. Enter the unlock code.
  9. Tap Done > Unlock.
  10. If you receive any error messages after attempting to permanently or temporarily unlock your device, contact customer care to inform them of the issues you are receiving.