4G

4G is the fourth generation technology standard for  s, succeeding 3G. A 4G system must provide capabilities defined by in. Potential and current applications include amended access,, gaming services,  , , and.

History
In March 1998, the (ITU-R) specified a set of requirements for 4G standards, named the International Mobile Telecommunications Advanced (IMT-Advanced) specification, setting peak speed requirements for 4G service at 100 megabits per second (Mbit/s, or 12.5 megabytes per second)   for high mobility communication (such as from trains and cars) and 1 gigabit per second (Gbit/s) for low mobility communication (such as pedestrians and stationary users).

Deployment
The world's first publicly available (LTE) services were opened on December 14, 2009 in two Scandinavian capitals: a system by  and  in, and a system by  in. Both were branded 4G with user terminals were manufactured by Samsung.

In early 2012, was criticized for marketing their  infrastructure as "4G" for iPhone 4S. In September 2012, Apple released the iPhone 5, the first model with actual support for 4G LTE for data. However, early 4G phones that do not support (iPhone 5C, 5S and earlier) will no longer be able to make calls when 3G networks are retired in 2022. In October 2020, Apple introduced the iPhone 12 product line, the first to support 5G connectivity.