Because Saipan Forum suspended the application for certificate from June 22nd of 20 1 1. So no one can apply for a permit.
Can crack the phone to achieve signature-free installation.
I suggest you go to "Saipan Smartphone Forum" to learn how to crack it (website: Baidu search "Saipan Smartphone Forum", and then enter the area corresponding to your mobile phone model). You don't need a certificate if you crack it!
Once cracked, you can install all kinds of software at will.
I hope I can help you. If you are satisfied with my answer, please click the "Satisfied Answer" button below my answer.