Learn how to use the Mobile Device Unlock code of the Nokia Lumia 435.
- Determine if devices are eligible to be unlocked.
- Turn on the phone with the non-T-Mobile SIM card. The device displays 'Please input unlock code.'
- Enter the unlock code. If successful, the device displays 'Phone is unlocked.'
- 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.
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