2 G era began to be used circa 1990 change to the analogue radio transmission is a transmission code division multiple access digital. Starting with the work on the transmission, but it is a small, short text information (SMS – Short Message Service) with a length of no more than 160 characters, the performance had been unable to determine the path to the base station (Cell site) Mobile phone prices began dropping to more users. Start with a Ring tone downloads, Graphic images, Wall paper, monotone, which is mostly black and white images. With a low resolution.The standard used in mobile phones, which is 2 times. 1. Global System for Mobile Communication – GSM is standard in Europe and Asia for about 160 of the management and maintenance of telephone, just a single number can be used worldwide (Roaming) are used across the network. 2. Code Division Multiple Access CDMA – popular in America and South Korea, users cannot use the telephone network. High quality audio and data signals that have a higher quality GSM.ู
การแปล กรุณารอสักครู่..
