Services advertised as 3G are required to meet IMT-2000 technical standards, including standards for reliability and speed (data transfer rates).
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The first 3G networks were introduced in 1998 and fourth generation 4G networks in 2008.
Several telecommunications companies market wireless mobile Internet services as 3G, indicating that the advertised service is provided over a 3G wireless network.
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This can be due to an incorrect URL, a misnamed file, an improper directive within the .htaccess file, or a file having been uploaded to an incorrect folder. This makes them especially suitable for use in modern smartphones, which require constant high-speed internet connection for many of their applications.4G is the fourth generation of mobile phone communications standards.In a press release, the ITU stated: As the most advanced technologies currently defined for global wireless mobile broadband communications, IMT-Advanced is considered as '4G,' although it is recognized that this term, while undefined, may also be applied to the forerunners of these technologies, LTE and Wi Max, and to other evolved 3G technologies providing a substantial level of improvement in performance and capabilities with respect to the initial third generation systems now deployed.This opened the door for LTE, Wi Max and HSPA to be designated 4G because these technologies can all deliver multiple megabits per second upstream and downstream, far more than most existing 3G networks.2G networks were the first to offer data services and SMS text messaging, but their data transfer rates are lower than those of their successors.