What should I do if the WiFi cannot be connected or the signal is weak?

First, confirm whether the WiFi frequency band of the router is 2.4 GHz. b.Try to use the mobile phone hotspot to check if the connection is normal. Delete and reconnect to the WiFi: In the WiFi settings of the mobile phone, delete the network of this router, and then search for it again and enter the password to connect, to see if the signal can be improved. c.Try to connect after restarting the router to check if it is normal. Meanwhile, check whether there are interference sources near the router interfering with the signal. d.Contact the after-sales customer service team for support.