1. Windows Central Question's Avatar
    I need a Sim unlock cod for my lumia 640 lte
    08-14-2016 07:59 PM
  2. Chintan Gohel's Avatar
    I need a Sim unlock cod for my lumia 640 lte
    you need to get in touch with the carrier to get the Personal Unlock Code (PUK)
    08-14-2016 11:08 PM
  3. Guytronic's Avatar
    For users in the US...

    If it's a T-Mobile phone call 611 from the phone have your IMEI written down so you can verify it with the customer service operator and request an unlock.
    They may unlock it if you have been an account holder in good standing for 40 days or longer.

    If it's a AT&T branded phone you can request an unlock.
    More information is here if you're a US user:
    https://www.att.com/deviceunlock/#/

    Good luck please consider joining WC as a member for more help.
    08-14-2016 11:08 PM

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