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  2. Roaming SIM - Wikipedia

    en.wikipedia.org/wiki/Roaming_SIM

    The use of roaming SIM cards in its most common form is in normal voice applications such as mobile phone calls. The common application of roaming SIMs for voice is where mobile calls are automatically routed to, and made on, the least cost network. This typically means that incoming calls are free, no matter which network a mobile user is on.

  3. List of mobile network operators in Asia and Oceania

    en.wikipedia.org/wiki/List_of_mobile_network...

    4G : FDD LTE : B1/B3 (Roaming on Truemove H, B8 prohibited) 4.5G : Up to 2xCA B1+B3, nationwide 4x4 MIMO on B3, 256/64QAM 4G Calling ( VoLTE , ViLTE ) : Unsupported

  4. Telecommunications in India - Wikipedia

    en.wikipedia.org/wiki/Telecommunications_in_India

    The country code for India is 91. Several international fibre-optic links include those to Japan, South Korea, Hong Kong, Russia, and Germany. Some major telecom operators in India include the privately owned companies like Vi, Airtel, and Reliance Jio and the state-owned companies - BSNL and MTNL.

  5. BSNL Mobile - Wikipedia

    en.wikipedia.org/wiki/BSNL_Mobile

    Bharat Sanchar Nigam Limited (BSNL) was incorporated on 15 September 2000. It took over the business of providing telecom services and network management from the erstwhile Central Government Departments of Telecom Services (DTS) and Telecom Operations (DTO), with effect from 1 October 2000 on a going concern basis, in early days it was known as CellOne for GSM mobile services, Excel for ...

  6. GSM services - Wikipedia

    en.wikipedia.org/wiki/GSM_services

    If a subscriber is roaming on a different company's network, the subscriber, instead of the caller, may pay a surcharge for the connection time. International roaming calls are often quite expensive, and as a result some companies require subscribers to grant explicit permission to receive calls while roaming to certain countries.

  7. List of UMTS networks - Wikipedia

    en.wikipedia.org/wiki/List_of_UMTS_networks

    The following is a list of mobile telecommunications networks using third-generation Universal Mobile Telecommunications System (UMTS) technology. This list does not aim to cover all networks, but instead focuses on networks deployed on frequencies other than 2100 MHz which is commonly deployed around the globe and on Multiband deployments.

  8. List of mobile telephone prefixes by country - Wikipedia

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

    Various GSM and CDMA, including Aircel GSM, Airtel, BSNL GSM & CDMA, Idea, Loop Mobile GSM, MTS CDMA, Reliance GSM & CDMA, S-Tel GSM, Uninor GSM, Videocon GSM, Vodafone GSM. 8xx 90x: Various GSM 91x: Various GSM and CDMA, including MTS CDMA, BSNL GSM & CDMA, Uninor GSM, Loop Mobile GSM, S-Tel GSM etc. 92x: Tata Indicom CDMA 93x: Reliance CDMA ...

  9. List of LTE networks in Asia - Wikipedia

    en.wikipedia.org/wiki/List_of_LTE_networks_in_Asia

    Country or Territory Operator VoLTE B1 2100 MHz B3 1800 MHz B5 850 MHz B7 2600 MHz B8 900 MHz B20 800 MHz B28 700 MHz B31 450 MHz B40 2300 MHz B41 2500 MHz CA [G 1] schemes References & Notes