The 2G technology was nowhere near up to the job, so the industry began to work on the next generation of technology known as 3G. The main technological difference that distinguishes 3G technology from 2G technology is the use of packet switching rather than circuit switching for data transmission. [48] Today, 2G networks are significantly slower than other cellular networks, and in several countries, 2G networks are being switched off. As of today, there are 4 main voice protocols for mobile voice transmission. VoWIFI (WiFi calling), VoLTE (4G calling), 3G and GSM. GSM is the legacy protocol dating as far back as the 1980s. 2G (nebo 2-G) je zkratka pro 2. generaci bezdrátové telefonní technologie mobilního telefonu. GSM 2G je schopen přenášet data, SMS, digitální hlasový hovor, či ostatní základní pomocná data, jako např. datum a čas. Služby 2G byly v USA často uvedeny jako Personal Communications Service (PCS). Technologie 2G jsou rozděleny do 3G. The third generation was launched in 2001 as an UMTS networks. The data transmission speed was improved by introducing the HSPA which allows up to 7.2 Mbit/s for download and 2 Mbit/s for upload speed. Things like TV on your phone or live stream became possible. HSPA+ was introduced in 2008 and brought the greatest increase in speed GSM 850, GSM 900, GSM 1800, GSM 1900: 3G capabilities: 5G capabilities . 2G, first introduced in 1992, is the second-generation of cellular telephone technology and the first to use digital LTE (4G), GSM (3G & 2G), CDMA (3G & 2G), 5G and ISM. The fundamental differences between these four modern technologies is the way they transmit and receive information. LTE (Long Term Evolution) is a 4G communication standard designed to be 10x faster than standard 3G. the technology provides IP-Based communication of voice and multimedia and Ofcom has said that even after the 3G switch-off, customers using EE, Vodafone and O2 networks on older devices can still use 2G - until it switches off - to make voice calls and send text messages. Second Generation (2G) technology was launched in the year 1991 in Finland. It is based on the technology known as global system for mobile communication or in short we can say GSM. This technology enabled various networks to provide services like text messages, picture messages and MMS. In this technology all text messages are digitally… qXF5aK.