Where the mobile phone is repaired, you can only brush around 40 yuan.
If it is permitted, please ask KF to solve it.
Sony Ericsson KF national consultation telephone number: 4008 100000 (local call charge)
It can also be solved by brushing the machine.
PS: Unlock: Unlock the SIM card of the mobile phone. The current SIM card of Sony Ericsson mobile phone does not include network lock, subnet lock, service provider lock, company lock and extended information lock. You can press right * Zuo Zuo * left * in turn to enter the service menu when the keyboard is unlocked by standby-> Service information-> Look in the SIM card lock. In general, the SIM card lock of mobile phones in retail stores is fully open, which means that all SIM cards can be inserted and used at will. If you find out what kind of lock it is, it means that the mobile phone will lock this card and can only use certain SIM cards. For example, if you lock the network lock, you can only use the SIM card provided by a network operator. Generally speaking, custom machine Mobile and custom machine, foreign operators, may be network lock machines. If you want to use another network operator's SIM card, you need to unlock it.