From June 22, 20 1 1 year, the production of competition certificates stopped. At present, there are three solutions: ① downloading direct signing tools, which are numerous and the simplest, but the permissions are quite low and can only solve a small part of software; 2 cracking the mobile phone is relatively easy; There are all kinds of very mature tutorial posts on Saipan forum, which can be successfully cracked in less than 2 minutes. I recommend you to use this method; 3 Brush the machine, you can brush all kinds of firmware yourself, with a high degree of DIY and many precautions, which is risky for Xiaobai and newcomers.