1, restart the wireless router, if the recovery may be the wireless router too long extension machine.
2, if the computer is also connected wirelessly, please check the IP address and DNS obtained by the computer, and compare the IP address DNS obtained on the mobile phone to see whether the gateway and DNS are correct.
3, if the computer is wired to the wireless router, and the mobile phone is wireless connection, please use the computer to log in the wireless router, reset the router try.
4. Check the MAC address filtering Settings of the router to see whether the mobile terminal is added to the blacklist or prohibited from accessing the Internet.
5, restart the phone to see if there is a problem with the phone connection.
6, if the above method is invalid, try to restore the initial setting: in the case of wireless router power, press the RESET key, after 5 seconds, release. After the router restores its initial Settings, try setting the wireless router again.