Can Telecom 3G mobile phones use Telecom 4G cards?

Yes, the telecom 4G card is compatible with the telecom 3G and 2G networks, so the telecom 3G mobile phone can use the telecom 4G card, but the telecom 4G card of the telecom 3G mobile phone can only use the telecom 3G and 2G networks.

Now it's all 3g and 4g convergence. If the mobile phone is 3g, it can only connect to the 3G network. If the mobile phone is changed to 4g, it will automatically switch to 4G network. When you use the 4g network, you will automatically switch back to the 3g network, so you don't need to be careful that the coverage of the 4g network is not wide enough.

In addition, it doesn't mean that the 3g mobile phone of Telecom can directly use the 4g network by replacing the 4g card. You also need a mobile phone to support the telecom's 4GTDD-LTE standard, and you can only use the 4G network after purchasing a 4G mobile phone. At present, China Telecom's 4G network is under construction. You need to change your mobile phone and card to use the improved 4G network.

Extended data

4G is the abbreviation of the fourth generation mobile communication and its technology. It is a technical product that integrates 3G and WLAN and can transmit high-quality video images, and the image transmission quality is comparable to that of HDTV.

Telecom 4G, also known as Tianyi 4G, is a communication tariff package launched by China Telecom based on 4G network. In 20 13, the opening ceremony and press conference of China Telecom Tianyi 4G service was held ceremoniously, and China Telecom Tianyi 4G trial network was opened in Nanjing, adding 4G network assistance on the basis of excellent 3G.

On February 3, 20 14, Telecom 4G was officially opened in China. 2065438+On February 27th, 2005, the Ministry of Industry and Information Technology officially issued the FDD-LTE license to China Telecom. Since then, China Telecom will enter the era of high-speed development of 4G.

Refer to Baidu Encyclopedia-Telecom 4G