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  2. Mobile telephone numbering in India - Wikipedia

    en.wikipedia.org/wiki/Mobile_telephone_numbering...

    Mobile telephone numbering in India. In India, mobile numbers (including pagers) on GSM, WCDMA, LTE and NR networks start with either 9, 8, 7 or 6. Each telecom circle is allowed to have multiple private operators; earlier it was two private + BSNL/MTNL, subsequently it changed to three private + BSNL/MTNL in GSM; now each telecom circle has ...

  3. Telephone numbers in India - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_India

    A typical mobile number in India is "+91 xxxx-nnnnnn". The first four digits initially indicated an operator's code, while the remaining six digits are unique to the subscriber. However, with mobile number portability in place, the first four digits no longer indicate a particular operator.

  4. Multi-factor authentication - Wikipedia

    en.wikipedia.org/wiki/Multi-factor_authentication

    Two-step authentication involving mobile phones and smartphones provides an alternative to dedicated physical devices. To authenticate, people can use their personal access codes to the device (i.e. something that only the individual user knows) plus a one-time-valid, dynamic passcode, typically consisting of 4 to 6 digits.

  5. Personal identification number - Wikipedia

    en.wikipedia.org/wiki/Personal_identification_number

    Mobile phone passcodes. A mobile phone may be PIN protected. If enabled, the PIN (also called a passcode) for GSM mobile phones can be between four and eight digits and is recorded in the SIM card.

  6. Telephone numbers in Latvia - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Latvia

    The Latvian telephone numbering plan is a telephone number assigning system used in Latvia. All the numbers consist of 8 digits with exceptions for special services.

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

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

    Add, replace or remove AOL account recovery info. 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.

  8. Why am I asked to verify my account after signing in?

    help.aol.com/articles/why-am-i-asked-to-verify...

    You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following reasons: • AOL notices suspicious account activity. • You're using an unfamiliar browser or device. • You're traveling away from your usual location.

  9. National conventions for writing telephone numbers - Wikipedia

    en.wikipedia.org/wiki/National_conventions_for...

    Mobile numbers which are not local need to be prefixed by a 0 while dialing, or by +91 (91 is the country code for India). A mobile number written as +91-AAAAA BBBBB is valid throughout India, and in other countries where the + is recognized as a prefix to the country code. Since 2015, calls from mobile phones to any other mobiles do not need ...

  10. One-time password - Wikipedia

    en.wikipedia.org/wiki/One-time_password

    Mobile phone. A mobile phone itself can be a hand-held authentication token. Mobile text messaging is one of the ways of receiving an OTAC through a mobile phone. In this way, a service provider sends a text message that includes an OTAC enciphered by a digital certificate to a user for authentication.

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

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

    Call paid premium support at 1-800-358-4860 to get live expert help from AOL Customer Care. Take control of your account's security and require a verification code, in addition to your password, to sign in to AOL.