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2. SIM lock - Wikipedia

   en.wikipedia.org/wiki/SIM_lock

   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. This is in contrast to a phone (retrospectively called SIM ...

3. Refurbishment (electronics) - Wikipedia

   en.wikipedia.org/wiki/Refurbishment_(electronics)

   Refurbishment (electronics) In electronics, refurbishment is the practice of restoring and testing a pre-owned electronic device so that it can be re-sold. Refurbished electronics are therefore pre-owned electronic devices (usually smartphones, tablets, or laptops ), that have been tested by a reseller to confirm that they are fully working.

4. History of mobile phones - Wikipedia

   en.wikipedia.org/wiki/History_of_mobile_phones

   A satellite phone is a type of mobile phone that connects to other phones or the telephone network by radio link through satellites orbiting the Earth instead of terrestrial cell sites, as cellphones do. Therefore, they can work in most geographic locations on the Earth's surface, as long as open sky and the line-of-sight between the phone and ...

5. List of open-source mobile phones - Wikipedia

   en.wikipedia.org/wiki/List_of_open-source_mobile...

   Distributions for existing phones[edit] KDE Plasma Mobile running on postmarketOS on the Nexus 5. postmarketOS, Ubports, and KDE Neon are open-source distributions running on existing smartphones originally running Android. Maemo Leste is available for Nokia N900 and Motorola Droid 4.

6. Phones 4u - Wikipedia

   en.wikipedia.org/wiki/Phones_4u

   Phones 4u Finance Plc. The Discovery Store. Website. phones4u.co.uk at the Wayback Machine (archived 2013-08-28) Phones 4u was a large independent mobile phone retailer in the United Kingdom. It was part of the 4u Group based in Newcastle-under-Lyme, Staffordshire. Opening in 1996, it expanded to over 600 stores.

7. Smartphone - Wikipedia

   en.wikipedia.org/wiki/Smartphone

   Some mobile phones can make mobile payments via direct mobile billing schemes, or through contactless payments if the phone and the point of sale support near-field communication (NFC). Enabling contactless payments through NFC-equipped mobile phones requires the co-operation of manufacturers, network operators, and retail merchants.