Specific solutions are as follows:
1, click the Settings in your tablet, backup and reset, and then reset your tablet, which is the so-called restore factory Settings, but the next application in your tablet is gone
2. Remove the router and reinstall it
3, the reason may be the tablet hardware and software related, first of all, we first eliminate the software problem, you can try to restore the factory design, and turn off the Bluetooth function. Turn on WIFI again. If it still doesn't connect, it could be hardware related... Speaking of hardware, first of all, the WIFI antenna in the assembly of its connector is very unreliable, you can try to open the body to see if there is a good connection.