When working with computers and networking problems invariably happen. This section will offer steps that can be tried to resolve Wi-Fi connectivity issues with your iPad.
What to do if your iPad can't access a visible network:
The first step is to make sure that the wireless connection does not require a password. You can determine this by seeing if there is a lock symbol next to the wireless network name. If there is, then make sure you know the correct password to the network before attempting to join it. If that still does not resolve your issue, try moving closer to the wireless router and seeing if you are able to connect then.
Use WPA or WPA2 wireless security
Check the wireless security option of your Wi-Fi router. If WEP is being used, try using WPA or WPA2.
Some Wi-Fi routers using WEP wireless security may cause intermittent disconnects to iPad which requires re-typing a password. Using WPA or WPA2 wireless security on your network will correct this issue.
Note: WPA and WPA2 encryption protocols are newer, more effective security options for wireless networks than the older WEP protocol.
Adjust screen brightness
Check to see if your screen brightness is set to the lowest level by going to Settings > Brightness & Wallpaper. If brightness is at lowest level, increase it by moving the slider to the right and set auto brightness to off.
Note: Brightness control in the iBooks application can also be used to adjust brightness.
What to do if you cannot access the Internet when connected to a wireless network:
If it shows that you are connected to a network, but you still cannot access the network, you should first make sure that your Internet connection is actually working. Test the connection from another computer and device to confirm that it is working. If it is working, go into the Wi-Fi settings for this particular connection on the iPad and under the DHCP settings, make sure that you have an assigned IP Address, Subnet Mask, Router, and DNS. If you do not have these fields populated, then tap on the Renew Lease button, and then tap on the Renew button when it asks if you with to continue. This will make the iPad request new connection settings. Once that is done, if you now have settings in the DHCP fields, try connecting to the Internet again.
How to fix slow iPad Wi-Fi speeds or low quality wireless connections:
Unfortunately there have been a lot of reports that the iPad wireless range and sensitivity is not as good as it could, or should, be. That means that Wi-Fi connections that work fine with other devices or computers may not work as well with the iPad. To determine the quality of your Wi-Fi connection, you can look in the upper left-hand corner of the device. The three quality levels are shown from best to worst with the lower the level being the worst connection speed.