How to lock the PIN lock on the SIM card

There are two solutions: 1. you can use other mobile phones to call telecom service providers and manual services. After providing relevant personal information, you can obtain the PUK code. Next, you can click an emergency call in the locked mobile phone number, then, press the following keys on the keyboard in sequence: ** 05 * [pukcode] * [new PIN code] * [new PIN code] #. Then, you can specify a new PIN code. Note: [] there is no space in the middle, and the pukcode is what people tell you

2. find a computer that can access the Internet, and then use our mobile phone number and service password to log on to the China Mobile online business office, after successful logon, we can query the pukcode on "personal information"-"personal settings". If the phone is locked, the pukcode is displayed, we can use it to decode it.