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Two decades of evolution of mobile phones, from a 1992 Motorola DynaTAC 8000X to the 2014 iPhone 6 Plus. A mobile phone or cell phone [a] is a portable telephone that can make and receive calls over a radio frequency link while the user is moving within a telephone service area, as opposed to a fixed-location phone (landline phone).
This is the list of mobile phone brands sorted by the country from which the brands originate. The number of mobile phone brands peaked to more than 750 in 2017 before declining to nearly 250 brands in 2023.
The former NMT network numbers used operator code 049. Most NMT numbers were transferred to GSM numbers with format 04x0 123 456 or 0500 123 456, as there were only 6 digit subscriber numbers in NMT numbers. The area code for fixed landline subscriptions in Kymi is 05, and should not be confused with mobile numbers starting with 050.
O2 offers several over-the-phone information services for a fee. Note that many of the services are offered only in Czech: Info Line (Czech Number Directory): 1180; Info Line (Foreign Number Directory): 1181; Operator for changed numbers (re-numbering): 141 11; Information on air quality: 141 10; Exact time: 141 12; Weather: 141 16; Medical ...
A key technical aspect of Mobile Number Portability (MNP) involves the routing of calls or mobile messages (SMS, MMS) to a number once it has been ported.Various call routing implementations exist globally, but the International and European best practice employs a central database (CDB) of ported numbers.
Mobile number portability was introduced on 1 October 2008 for mobile phone numbers in a bid to increase market competition. Thus, subscribers are allowed to retain their mobile numbers when they switch to another service provider. Therefore, the mobile number prefix only indicates the original service provider.
Number 41 was allocated for Virgin Mobile numbers (year 2022) Number 5 was added before all STC numbers; Number 6 was added before all Ooredoo Telecom - Formerly Wataniya Telecom numbers; Number 9 was added before all Zain numbers; All the three digit lines remained the same without any additional number e.g. 121, 107, 113, 112, etc.
Hence, mobile phone numbers are written 04AA BB BB BB. Sometimes, the last six digits are written in two groups of 3 digits to increase readability: 04AA BBB BBB. Numbers are sometimes written with a slash in between the zone prefix and the subscriber's number. This is the case for both land lines and mobile phone numbers.