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KeKu, formed in April 2010, currently offers international calling to its users by assigning local numbers to contacts in 41 countries. [1] KeKu uses its own patented Smart Dial technology for its services. [2] Users can make use of KeKu's services via its iOS, Android and Google Chrome apps as well as in-browser calling from keku.com. [3] [4]
Ringo was an international calling app for smartphones that utilized dedicated phone circuits for making calls. [3] Ringo used local phone networks instead of the user's smart phone's Internet connection to connect calls. [4] The caller, but not the called party, downloaded and used the app to make calls. [5]
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.
A typical SIM card (mini-SIM with micro-SIM cutout) A SIM card or SIM (Subscriber Identity Module) is an integrated circuit (IC) intended to securely store an international mobile subscriber identity (IMSI) number and its related key, which are used to identify and authenticate subscribers on mobile telephone devices (such as mobile phones and laptops).
SIM Application Toolkit (STK) is a standard of the GSM system which enables the subscriber identity module (SIM card) to initiate actions which can be used for various value-added services. [1] Similar standards exist for other network and card systems, with the USIM Application Toolkit (USAT) for USIMs used by newer-generation networks being ...
The first iPhone models to not have a SIM card tray and work exclusively with eSIM were the iPhone 14 and iPhone 14 Pro, announced in 2022. [20] Outside the United States, all iPhone models continue to be sold with support for physical SIM cards, but the iPad Air (6th generation) , iPad Pro (7th generation) , and iPad Mini (7th generation ...
Wi-Fi calling, also called VoWiFi, [1] refers to mobile phone voice calls and data that are made over IP networks using Wi-Fi, instead of the cell towers provided by cellular networks. [2] Using this feature, compatible handsets are able to route regular cellular calls through a wireless LAN (Wi-Fi) network with broadband Internet , while ...
Programs to remove SIM lock restrictions are available, but are not supported by Apple, and most often not a permanent unlock – a soft unlock, [217] which modifies the iPhone so that the baseband will accept the SIM card of any GSM carrier. SIM unlocking is not jailbreaking, but a jailbreak is also required for these unofficial software unlocks.