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  2. Tesco Mobile - Wikipedia

    en.wikipedia.org/wiki/Tesco_Mobile

    Tesco Mobile was established in May 2003 [4] and launched pre-paid mobile services in Tesco stores and online by the end of the year. [5] In January 2014, the network in the United Kingdom started offering 4G service, for its pay monthly and SIM only customers at no extra cost, extending the service to pay as you go customers in July of that year.

  3. SIM lock - Wikipedia

    en.wikipedia.org/wiki/SIM_lock

    This is in contrast to a phone (retrospectively called SIM-free or unlocked) that does not impose any SIM restrictions. Generally phones can be locked to accept only SIM cards with certain International Mobile Subscriber Identities (IMSIs); IMSIs may be restricted by: Mobile country code (MCC; e.g., will only work with SIM issued in one country)

  4. 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 ...

  5. Asda Mobile - Wikipedia

    en.wikipedia.org/wiki/Asda_Mobile

    Asda Mobile was founded in 2007, [1] and was only available in 51 of Asda's stores at first. [2] The network was launched in response to lack of transparency among other retailers about their mobile offers and was directly competing with Tesco Mobile. [3] [4] The network originally running on Vodafone infrastructure until 2013, when it switched ...

  6. Turbo SIM - Wikipedia

    en.wikipedia.org/wiki/Turbo_SIM

    The Turbo SIM is claimed to work with any GSM mobile phone produced since 1998, and can be used to add new functionality such as larger SMS archives to some phones. [2] However, dual SIM technologies have been found not to work with some phones. This device, and those like it, use a small microcontroller (the original Turbo SIM used an Atmel ...

  7. Cell Phone Freedom Act - Wikipedia

    en.wikipedia.org/wiki/Cell_Phone_Freedom_Act

    The Cell Phone Freedom Act (formally An Act respecting the locking of cellular telephones) was a private member's bill proposed twice to the Parliament of Canada which would have required mobile phone providers remove the SIM lock from devices once a customer reaches the end of their contract.

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