How to Unlock the Ericsson F3507G Mobile Broadband MiniCard

Written by chanel adams
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How to Unlock the Ericsson F3507G Mobile Broadband MiniCard
The Ericsson MiniCard is located in the back of your phone. (sim card image by Stephen Gibson from

The Ericsson MiniCard (SIM card) works with mobile carriers such as AT&T and T-Mobile. If you want to switch networks, you must unlock your MiniCard. This includes obtaining a PIN Unlock Key (PUK) from your mobile carrier. Once you have a PUK code, you can use a PIN to further secure your mobile phone from unauthorised use.

Skill level:

Things you need

  • PUK
  • PIN number

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  1. 1

    Contact your mobile carrier. Request a PIN Unlock Key (PUK). Verify your full name, street address, telephone number and account number.

  2. 2

    Enter the eight-digit PUK code. Press the "OK" button.

  3. 3

    Enter a new PIN number. It should be between four and eight digits in length. Press the "OK" button.

  4. 4

    Re-enter the PIN number. Press the "OK" button. You now have unlocked your Ericsson MiniCard.

Tips and warnings

  • Entering the PUK code 10 times incorrectly will lock your MiniCard permanently.

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