China's cdma system is divided into: cdma2000 for telecommunications; Unicom's tdcdma；; Mobile wcdma；; They are incompatible with each other. Blackberry default is cdma system in Qualcomm, and only Unicom card can be used. This is determined by the circuit. Burning rom only writes the information of umi card into the machine, bypassing the hardware.

It's up to you to decide which cdma system you want to use. After all, BlackBerrys are standard in the United States and Canada, not in China. Unless you buy customized BlackBerrys for telecom, China Unicom and mobile, that's the sky-high price!

Are you stupid? Find out what CDMA is, and are TD and WCDMA CDMA systems? You 2~B youths come out to mislead people!