The router is faulty. Please check whether the computer with a wired connection can be used normally, because sometimes even if the WIFI signal is displayed, it does not mean that the broadband is normal. If the wired computer is no longer available, re-check whether the broadband line is faulty.
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If the mobile phone is not compatible with the wifi network, it is recommended to reset the wifi network and modify the encryption mode and try again.
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Or maybe the WiFi password has been changed, and the computer has used the new password to connect, but the phone has not.
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The correct sharing network is not selected.
If the computer can be connected to the Internet normally, the mobile phone can not be connected to the following reasons.
1, WIFI wire contact is poor.
2. Too many mobile phone hotspots need to be cleaned up.
3, WIFI setting error, or password reset.
4. If the WIFI password is deciphered, DHCP resources are exhausted.
5, mobile phone system software is abnormal, it is recommended to brush the machine (professional operation).
6. Other reasons. You can test it or fix it one by one, and hopefully it will help you.
This situation should be your mobile phone system has a problem, so the computer can connect to wifi but the mobile phone can not connect to wifi, it is recommended to upgrade your mobile phone system