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  2. Telephone numbers in Portugal - Wikipedia

    en.wikipedia.org/wiki/Telephone_numbers_in_Portugal

    Portugal changed to a closed telephone numbering plan on 31 October 1999; previously, the trunk prefix was '0', but this was dropped. [1]For landline subscribers, the area code, prefixed by the digit '2', was incorporated into the subscriber's number.

  3. How to Do a Free Reverse Phone Lookup & the 8 Best ... - AOL

    www.aol.com/finance/free-reverse-phone-lookup-8...

    The site enables you to find more than just reverse lookup names; you can search for addresses, phone numbers and email addresses. BestPeopleFinder gets all its data from official public, state ...

  4. International mobile subscriber identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    For GSM, UMTS and LTE networks, this number was provisioned in the SIM card and for cdmaOne and CDMA2000 networks, in the phone directly or in the R-UIM card (the CDMA equivalent of the SIM card). Both cards have been superseded by the UICC. An IMSI is usually presented as a 15-digit number but can be shorter.

  5. eSIM - Wikipedia

    en.wikipedia.org/wiki/ESIM

    A physical SIM can be transferred from a broken to a working phone. [34] The eSIM, which allows communications to be made and charged to the account-holder, cannot be removed if having the phone repaired, or lending it to someone. eSIM accounts must be deleted or transferred from a phone when it is sold or disposed.

  6. International Mobile Equipment Identity - Wikipedia

    en.wikipedia.org/wiki/International_Mobile...

    The phone identifies the subscriber by transmitting the International mobile subscriber identity (IMSI) number, which is stored on a SIM card that can, in theory, be transferred to any handset. However, the network's ability to know a subscriber's current, individual device enables many network and security features.

  7. Remote SIM provisioning - Wikipedia

    en.wikipedia.org/wiki/Remote_SIM_provisioning

    The eSIM describes the functionality in the SIM, not the physical size of the SIM - and there are eSIMs in many formats (2FF, 3FF, 4FF, MFF). GSMA have also developed a compliance framework [ 10 ] for eSIM devices, eUICCs, and subscription management products - to help with interoperability and security for products supporting eSIM.

  8. Reverse telephone directory - Wikipedia

    en.wikipedia.org/wiki/Reverse_telephone_directory

    Some forms of city directories provide this form of lookup for listed services by phone number, along with address cross-referencing. Publicly accessible reverse telephone directories may be provided as part of the standard directory services from the telecommunications carrier in some countries.

  9. List of mobile telephone prefixes by country - Wikipedia

    en.wikipedia.org/wiki/List_of_mobile_telephone...

    Users can switch carriers while keeping number and prefix (so prefixes are not tightly coupled to a specific carrier). If there is only 32.. followed by any other, shorter number, like 32 51 724859, this is the number of a normal phone, not a mobile. 46x: Join (discontinued mobile phone service provider) [3] 47x: Proximus (or other) 48x

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