According to your description, if the WLAN switch can't be turned on, this situation may be caused by system or hardware failure. It is recommended that you:
1. After restarting the machine, try to turn on the switch again.
2. Back up mobile phone data (phone book, SMS, multimedia files, etc.). ) and restore factory settings (enter phone settings-reset-restore factory settings).
If the problem still exists, in order to better understand and solve the problem of your mobile phone, it is recommended that you send the mobile phone to the nearest Samsung service center for testing, and the service center will determine the specific problems and accessories of the mobile phone according to the test results.
Please visit the address and contact information of the service center:
. Samsung . com/support/service locations . ASP
If you have any comments, suggestions and comments, please click: support.samsung.com.cn/survey.