I need a manual for my Apple Ipad Wifi 3g - Apple iPad 64 GB 3G Tablet PC

The information included with your question says that you have a 3G iPad, but it does not indicate that you have WiFi. If you have WiFi, touch the Settings app and, if WiFi appears, make sure that you are logged into a local WiFi network. If you have a 3G-only iPad, you must arrange for 3G service with your current, or another, phone provider. 3G service is considerably slower, and more expensive, than WiFi.

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To be able to install Viber, your iPad needs at least iOS 6.0 Apple did not release iOS6 for the iPad 1. So your is running on iOS 4 or 5.

Connect it to your PC via USB cable, then start iTunes.

Plug it into your computer and select factory reset on it in iTunes.

You can download it from http://support.apple.com/manuals/#ipad Hope this helps.

There may be a conflict between the wifi and 3g network.Shut off wifi to check for connection again.Then do opposite,shut off 3g to connect to wifi only.

Hi, on the wifi version of iPad. You cannot insert a sim on this unit. The 3G units has a slot for micro sim cards. The wifi version does not have the hardware inside necessary to access 3G networks.
Sorry

That behaviour is strange. I've never seen anything like that happen and i've owned iPads from the first version on.
I strongly suggest you make a last backup and then use iTunes to reinstall the iPad.
It might be a good idea to start without using the backup and test if turning off is working as expected then. After that reinstall the iPad again and use the Backup you made first to have all your settings, apps and such back. If the problem returns it's in the backup ....

heres the US apple store http://store.apple.com/us/browse/home/shop_ipad/family/ipad?aid=AIC-WWW-NAUS-K2-CONFIGURE-IPAD-INDEX&cp=CONFIGURE-IPAD-INDEX
Wi-Fi 16GB = $499 32GB = $599 64GB = $699 Wi-Fi & 3G 16GB = $629 32GB = $729 64GB = $829

As far as I understand it the ipads that have just been released are wifi only. 3g are available from late April, see the www.apple.com for details.