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  2. Factory reset - Wikipedia

    en.wikipedia.org/wiki/Factory_reset

    On Samsung smartphones, a factory reset operation does not affect the Knox Flag. As such, it does not reset the device to its original factory settings and is not a way to return the device to a state compatible with the manufacturer's warranty. Data on the SIM card and the microSD card is not erased. [citation needed]

  3. Personal unblocking key - Wikipedia

    en.wikipedia.org/wiki/Personal_unblocking_key

    A personal unblocking key ( PUK ), sometimes called personal unblocking code ( PUC ), is used in SIM cards to reset a personal identification number (PIN) that has been lost or forgotten. Most mobile phones offer the feature of PIN protection. After switching on the phone, if the PIN security function is active, the user is required to enter a ...

  4. SIM card - Wikipedia

    en.wikipedia.org/wiki/SIM_card

    A typical SIM card (mini-SIM with micro-SIM cutout) T-Mobile nano-SIM card with NFC capabilities in the SIM tray of an iPhone 6s cell phone A SIM (Subscriber Identity Module) card is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone ...

  5. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    A personal identification number ( PIN ), PIN code, or sometimes redundantly a PIN number, is a numeric (sometimes alpha-numeric) passcode used in the process of authenticating a user accessing a system. The PIN has been the key to facilitating the private data exchange between different data-processing centers in computer networks for ...

  6. Add or disable 2-step verification for extra security - AOL Help

    help.aol.com/articles/2-step-verification...

    1-800-358-4860. Get live expert help with your AOL needs—from email and passwords, technical questions, mobile email and more. Add or disable 2-step verification for extra security. Add an extra security step to sign into your account with 2-step verification. Find out how to turn on 2-step verification and receive a verification code, and ...

  7. Contactless payment - Wikipedia

    en.wikipedia.org/wiki/Contactless_payment

    Contactless payment systems are credit cards and debit cards, key fobs, smart cards, or other devices, including smartphones and other mobile devices, that use radio-frequency identification (RFID) or near-field communication (NFC) for making secure payments. The embedded integrated circuit chip and antenna enable consumers to wave their card ...

  8. Add, replace or remove AOL account recovery info - AOL Help

    help.aol.com/articles/add-or-update-aol-account...

    Keep a valid mobile phone number or email address on your account in case you ever lose your password or run into a prompt to verify your account after signing in. We'll also include your recovery email address when sending a notification of changes made to your account. Add a mobile number or email address

  9. Chip Authentication Program - Wikipedia

    en.wikipedia.org/wiki/Chip_Authentication_Program

    The Chip Authentication Program (CAP) is a MasterCard initiative and technical specification for using EMV banking smartcards for authenticating users and transactions in online and telephone banking. It was also adopted by Visa as Dynamic Passcode Authentication (DPA). [ 1] The CAP specification defines a handheld device ( CAP reader) with a ...