Why iPad, iPhone,iPod disconnect wifi

iPad and other apple products disconnect from wifi randomly

1.Update your Wi-Fi router to the latest firmware.
2.Disable 40MHz in the 2.4GHz settings on the Wi-Fi router. Mac computers, iPhone, iPad, and iPod touch do not support this mode. Disabling it may reduce interference issues.
3.If WPA2 using TKIP, change it to AES.
4.if you are using 2.4 GHz, use channels 1, 6 or 11 and only one of those channels. Prefer 6
5.On your apple devide go to Settings-General-Reset-Reset Network Settings.  You will need to reconnect the iPad to WiFi

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