According to the current report by Umeng, 42.4% of iOS user jailbreak their devices in China. Its breakdown is as follows.
The ratio of jailbreak:
iPhone 3GS 69.2%
iPhone 4 48.6%
iPhone 4S 36.1%
iPad2 3G 32.4%
iPad2 Wifi 31.9%
The jailbreak rate of the newer devices is lesser than older one. This report said that there are two reasons of its result.
1. The difficulty of jailbreak become more difficult than before.
2. The motivation of jailbreak is lower than before.
Actually, Apple is enhancing to measures for jailbreak, there are no method to jailbreak some version of base band. Furthermore Apple already started to provide official app center in China too, and users can download more than 300,000 apps or games from there.
According to the news, China Telecom start to sell iPhone 5 on December 10th, and China Unicom also start to sell it in the end of December.
Let's keep attention how much iPhone 5's jailbreak rate will be.
Source => Umeng