秘密主码指南
As we all know Chinese mobile phones are getting BIG market in all over country. Today in this apps, we are sharing some hidden secret codes to access service menus (engineering mode) and useful options in all type smartphones.
These codes have been tested in a few mobile phones with success and these codes should also work in almost all other cell phones.
Since the earliest days of cellular technology, secret codes have been embedded into the software of our mobile devices, and they’re still in place today. Included in these hidden codes for the mobile is a special diagnostics mode you can use to troubleshoot problems, get a more accurate signal reception measurement, and more. So download this apps an enjoy.