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  2. Personal unblocking key - Wikipedia

    en.wikipedia.org/wiki/Personal_unblocking_key

    If the wrong PIN is entered more than three times, the SIM card will become locked. It can be unlocked by entering the PUK code provided by the mobile service provider, [1] which may be available on the SIM card's packaging, the contract, or provided by customer service after identity verification. After the PUK code is entered, the PIN must be ...

  3. Mobile number portability - Wikipedia

    en.wikipedia.org/wiki/Mobile_number_portability

    Customers can port between prepaid and postpaid options. On porting IN, the recipient company provides, free credit and airtime. The service is handled by Pakistan MNP Database (Guarantee) Limited, [45] the joint venture of all the cellular companies of Pakistan. Number Portability Clearinghouse service is handled by iconectiv. Philippines ...

  4. List of mobile virtual network operators in the United States

    en.wikipedia.org/wiki/List_of_mobile_virtual...

    Mobile virtual network operators (MVNOs) in the United States lease wireless telephone and data service from the four major cellular carriers in the country—AT&T Mobility, Boost Mobile, T-Mobile US, and Verizon—and offer various levels of free and/or paid talk, text and data services to their customers.

  5. What’s a Personal Identification Number (PIN) - AOL

    www.aol.com/finance/personal-identification...

    The PIN is among the earliest ways to ensure information remains safe and reliable across countless digital transactions. Here's a closer look at what PINs are. What’s a Personal Identification ...

  6. AT&T Wireless Services - Wikipedia

    en.wikipedia.org/wiki/AT&T_Wireless_Services

    This was per a pre-spinoff agreement with AT&T Corp. that stated that if AT&T Wireless was to be bought by a competitor, the rights to the name AT&T Wireless and the use of the AT&T name in wireless phone service would revert to AT&T Corp. AT&T Wireless's prepaid services, Go Phone, was adopted by Cingular Wireless after the merger closed, and ...

  7. Add, edit, or delete a payment method for AOL services

    help.aol.com/articles/update-your-payment-method

    If your card number has changed, you must add a new card. 1. Sign in to your My Account page. 2. Click My Wallet. 3. Click Payment Methods. 4. Click Add Credit or Debit Card. 5. Enter the new info. 6. Click Submit.

  8. H2O Wireless - Wikipedia

    en.wikipedia.org/wiki/H2O_Wireless

    h2o Wireless is a United States-based prepaid cell phone service, that utilizes the AT&T network. [2] It is a brand of mobile virtual network operator (MVNO) Locus Telecommunications, a subsidiary of Telrite Holdings, Inc., since 2019. [1] [3] Locus was formerly a subsidiary of KDDI America corporation, starting in 2010.

  9. Payment card - Wikipedia

    en.wikipedia.org/wiki/Payment_card

    With prepaid cards the data is maintained on computers controlled by the card issuer. The value stored on the card can be accessed using a magnetic stripe embedded in the card, on which the card number is encoded; using radio-frequency identification ; or by entering a code number, printed on the card, into a telephone or other numeric keypad.