How to set the password of mobile phone service?

You can set the password of mobile phone service according to the following steps: 1. Open the dial-up interface of mobile phone and enter ##864# (# Service #) or *#06# (query IMEI number). 2. In the pop-up interface, select "Call". 3. After that, you will receive a short message containing the default service password of your device. 4. Open the phone settings interface and find the column of "Security Settings" or "Privacy Settings". 5. Find the "mobile phone service password" option in the setting interface, and click Enter. 6. Enter the necessary information to confirm your identity (for example, your mobile phone number). 7. Enter the password you want to set and confirm it. 8. After that, your mobile phone service password has been successfully set, which can be used to protect your mobile phone account information.