How to make Huawei Mate 8 turn the mobile phone into an empty number?

In standby mode, enter: **2 1*999999# and press the dial key ~OK, and you're done. In this state, the caller does not exist, and you will not receive the call. The code to cancel the empty status is: *2 1*9#. Finally, I would like to remind you that when you are finished, you will cancel the empty state to avoid mistakes. The way to set the mobile phone to the empty state is to enter "*" in the standby state. After someone calls you, you will hear the hint of an empty number. Of course, you can't know the phone information. The solution is to enter "##2 1#" and press [Dial]. Principle explanation: Because it is sensitive, I checked some information. It turns out that this is a call forwarding service, that is to say, the call is transferred to the empty number of "99999", and China Mobile does not charge for unsuccessful call forwarding, so it is still very useful. Similarly, you can also transfer to the number that has stopped and get the stop prompt tone. Of course, if you are brave enough, you can try to transfer your call to 1 10 (that is, "* * 21*/kloc-0 #"), 1 19, Peking University People's Hospital and other toll-free numbers. You can also try "**2 1* Jiao #" or "**2 1* Cecilia Cheung #" to express your condolences or make a phone call for predestination/love. (* The following table is from China Mobile) Function setting cancels query unconditional transfer **2 1* Phone number # # 2 1 # * # 2 1 # No signal transfer **62* Phone number # # 62 # * No answer transfer * * 665438. 6 1#*#6 1# When busy, transfer to **67# phone number # # 67 # * # 67 # and add another method to indicate that it is out of service area, which is very good and violent: unplug the battery directly when it is turned on.