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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. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    A SIM lock, simlock, network lock, carrier lock or (master) subsidy lock is a technical restriction built into GSM and CDMA [1] mobile phones by mobile phone manufacturers for use by service providers to restrict the use of these phones to specific countries and/or networks.

  4. Mobile network codes in ITU region 3xx (North America)

    en.wikipedia.org/wiki/Mobile_network_codes_in...

    T-Mobile: T-Mobile US: Operational: GSM 1900 / LTE 600 / LTE 700 / LTE 850 / LTE 1900 / LTE 1700 / LTE 2500 / 5G 600 / 5G 1900 / 5G 2500 / 5G 26000 / 5G 28000 / 5G 39000: Former Cook Inlet West Wireless, Voicestream; [142] now universal USA code. Also used for Mint Mobile, [143] Ting. [82] UMTS shut down July 2022, GSM to shut down Sep 2024 ...

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

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

    6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your authenticator app. 9. Click Done. Sign in with 2-step for authenticator app. 1. Sign in to your AOL account with your password. 2. Enter the verification code shown in your authenticator app. 3. Click Verify.

  6. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    A personal identification number (PIN; sometimes redundantly a PIN code or 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 financial ...

  7. Access AOL Mail on mobile devices

    help.aol.com/articles/aol-mail-mobile-mail

    The AOL App gives you access to all the best of AOL, including Mail's innovative features and settings. With the app version of AOL Mail, you'll be able to add accounts, send mail, organize your mailbox, and more on either Android or iOS .

  8. Update AOL Mail settings

    help.aol.com/articles/aol-mail-mail-settings

    Change any of the following settings, then click Save to finalize your selection: • Default View - Select your default view: Day, Week, Month or Year. • Time Zone - Click Settings | Calendar options. Select the Time Zone you would like. • Display - Click Settings | Calendar options. Choose what time your typical day goes from.

  9. Unstructured Supplementary Service Data - Wikipedia

    en.wikipedia.org/wiki/Unstructured_Supplementary...

    USSD on a Sony Ericsson mobile phone (2005). Unstructured Supplementary Service Data (USSD), sometimes referred to as "quick codes" or "feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers.