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What does gsm wcdma cdma mean?

Source: Internet
Author: User
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GSM is a 2G network and can be used by China Mobile Unicom.CDMA is a 2G network of China Telecom. 3G:WCDMA is China Unicom's 3G network,China Telecom 3G is CDMA 2000,China Mobile 3G is 3g/TD-SCDMA. Both of them are networks that are also supported by foreign countries. That is to say, if you have a mobile phone with this network standard and the software is unlocked, you can use it directly on a foreign card! 
 
The third type is China's self-developed td-SCDMA of China Mobile. This network is immature and there is still some distance from the first two! You must have a mobile phone number of China Mobile and a 3G mobile number of China Mobile!

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