3G standards are different, everything else is the same. 9900 is Unicom standard and 9930 is telecom standard, but unless it is licensed 9930, it won't work.

9930 includes telecom CDMA system, but it needs to burn the number and introduce SB in China. Theoretically, China Mobile, China Unicom and China Telecom can all eat it. In fact, when you can't burn the number, you only support mobile and Unicom's 2G network call messages, and you don't support BlackBerry service.

9900 supports mobile EDGE and Unicom's 3G, and supports BlackBerry BIS and BES services.

The main parameters are the same. The following are the main parameters of the two mobile phones.