The wireless network is grayed out, probably because there is something wrong with the phone's memory. You can try the following cleaning methods to solve this problem:

1, you can directly find the large file to be deleted, and then click Delete File to clear the memory;

2, or there will be a file management system on the mobile phone, which can be opened to find out the files and then cleaned up;

3, security software Tencent, mobile phone housekeeper's garbage cleaning, there is a mobile phone slimming, which can be used to sort out files on the mobile phone, you can use this to clean up junk files. Generally, booting and restarting can solve the problem.