Why can't a customized telecom mobile phone use two telecom cards at the same time?

1. There is little demand at present. At the same time, there are two telecom cards. Due to technical reasons, it is necessary to pay the patent fee to Qualcomm. These problems make it impossible for some mobile phones to use two telecom cards at the same time.

2. Telecom dual-card mobile phone does not support using two telecom cards at the same time, and its card slot 2 only supports using GSM network, namely Unicom or mobile phone card.

3. Patent fees in Qualcomm. Telecom CDMA technology patents are in the hands of "baseband madman" Qualcomm, including 2G CDMA 1x and 3G CDMA EVDO. Although telecom 4G is not CDMA, if you want to make a phone call or send a text message, you still need to use CDMA network.

4. Telecom version of mobile phone refers to cdma system, and customized mobile phone refers to the mobile phone with some telecom software and programs built into it jointly produced by telecom companies and mobile phone manufacturers. All enjoy the national three guarantees policy.

5. The telecom version only has a telecom network standard or a new version on the original model, while custom machine is a mobile phone customized by telecom companies and mobile phone manufacturers, with customized telecom services and applications.