Resolving iPad Wi-Fi Issues
One of the biggest bugs I have found with the iPad so far, is occasionally the iPad is unable to rejoin my Wi-Fi network on iOS 9.0.
I have tried some suggestions from Apple and the only way I have been able to get the iPad to rejoin the network is to reset my wireless router.
I would recommend you try to reset the network settings on the iPad first by going to Settings > General > Reset > Reset Network Settings.
If that doesn’t work reset your wireless router. Most of them have a reset button you hold for 10 seconds.
If you have a dual band router you can try this to keep the problem from recurring;
- Create separate Wi-Fi network names to identify each band. This can be done easily by appending one or more characters to the current network name. Example: Add a G to the 802.11b/g network name and an N to the 802.11n network name.
- Ensure that both networks use the same security type (WEP, WPA, WPA2, and so on).
Apple has acknowledged the Wi-Fi problems and has a knowledge base article with some recommendations. They have also stated that there will be a software update addressing this issue, the iOS 8.3 Wifi issue is worst.