2. Step 2: Enter the command "*300 1# 12345#*" in the call interface of Apple mobile phone, as shown in the following figure.
3. Step 3: Know the signal parameters. Generally, the signal intensity sent by the base station is "-40dB ~-60dB"; The signal is good "-60db to-80dB"; The signal difference is "-90db to-10dB".
4. Step 4: After entering the engineering mode of Apple mobile phone, observe the pop-up interface, and you can see that the signal strength of the mobile phone is "-1 17db" in the upper left corner, as shown in the following figure.
5. Step 5: When we find that the signal strength is-1 17db, the signal is poor at this time, so we can change the call environment, and then dial "*300 1# 12345#*" again, and check the signal strength after entering the interface, and it really is -79db.
6. Step 6: After we check the signal strength of the mobile phone, I want to quit the project mode and click the "home" button of the mobile phone.
Extended data:
IPhone is a series of smart phones developed by Apple in the United States, which is equipped with the iOS operating system developed by Apple.
In fact, there is a hidden application in the use skills of iPhone6 6p, which can be used to detect the value of iPhone6 signal and iPhone6 cellular network, and can accurately display the strength of mobile phone signal through numbers. And it allows you to switch between the signal grid and the numerical value, as follows: The smaller the numerical value, the worse the signal.
Generally speaking, between -40 and -50 is near the base station;
The signal between -50 and -60 is very good;
Good signal between -60 and -70;
Between-70 and-80, the signal is slightly weak;
Between-80 and-90, the signal is weak;
Below -90 is the basic communication state.
If it is-100, it is recommended to sleep at night or fly in mode, otherwise it will consume a lot of electricity and radiate!
Baidu Encyclopedia: iPhone