The difference between mobile 2g and 3g
What is the difference between 3G mobile phone cards and 2G mobile phone cards? What are the characteristics and differences between 3G and 2G? 2G is the second 3G is the abbreviation of the first generation mobile phone communication technology, and 3G is the abbreviation of the second generation mobile phone communication technology. The following will summarize:
1. Different formats and standards: (1) The main 2G standards are They are GSM and CDMA, and most except the United States use GSM; (2) There are currently four standards for 3G: CDMA2000, WCDMA, TD-SCDMA (used by China Mobile 3G), and WiMAX.
2. Internet speeds are different: (1) 2G GPRS Internet access generally reaches a maximum of about 30K; (2) 3G Internet access generally reaches a maximum of about 700K; (3) If you use wifi, there is no difference between 2G and 3G .
3. Different coverage rates: 2G coverage is much higher than 3G, especially in mountainous areas.
4. Different tariffs: The tariffs of 3G cards are generally much more expensive than 2G cards.
5. Power radiation: 3G cards have less power and less radiation than 2G. It is healthier to use 3G.