How do you download iOS 0.6 - Apple iPad 2 Wifi 16GB

Yes!
Most people are now on iOS 8.4
So.... do you mean back grade? from 8 to 7
iOS 9 will be released in a few days!
https://www.apple.com/ios/

It can be downloaded & installed directly to your iPhone/iPad
Or... as I prefer.....
use my computer running iTunes to firstly Backup the iDevice (using it's USB charge cable)
ITUNES will at this time indicate that there is an update available for your iPad.
Choose to "download only" the new iOS.
If you have other things to do!
Disconnect while the download takes it's time downloading.
Then come back later and plug in USB cable and "Install" the updated iOS.
How to Update iOS Software on an iPad

Try this site for instructions:
http://www.iphonehacks.com/2014/02/install-ios-7-0-4-update-iphone-ipad-ipod-touch.html

How to install iOS 7 0 6 update on your iPhone iPad or iPod touch

For the iPad first generation (A1219) before iOS 5 to update is only possible with connecting the device to iTunes on a computer. Plug it into your computer and open up itunes under devices click on your ipad and then click on check for update.
- but this model supports only iOS 5
- NO iOS 6/7/8 !

iOS cannot be downloaded with safari
There are two ways to update the iOS version of your iPad 2:
- via connecting the device to iTunes on a computer
- or directly from within the device
but only since iOS 5 it is possible to update the iOS version without the need to connect the iOS device to a computer (over-the-air update)
just go to: settings - general - software update

There are two ways to upgrade the iOS of your iPad
- via connecting the device to iTunes on a computer
- or directly from within the device
so in your case you can try connecting the iPad to a computer with iTunes installed
procedure:

• Connect your iOS device to your computer using an USB cable. Wait for iTunes to open and connect to your device.

• Click on device button to the left of the iTunes Store button in the top right corner in iTunes.

• Hold down on the option key (Mac) or the shift key (Windows) and click the "Check for Update" button in the Summary pane. Browse to the .ipsw file you downloaded and select it.

• Do not disconnect your device until the update has finished.

• If necessary, restore your device from the previous backup and sync with iTunes.

Install iOS 7 0 4 update on iPhone or iPad Tutorial

internet connect was slow. Try to download again, maybe about 2 am when most people was asleep

iOs 6 is not compatible with the first gen iPad:
Apple iOS 6 Finally Available for Download Direct Download Link Download Apple iOS 6

There are two ways to upgrade the iOS version of your iPad
- via connecting the device to iTunes on a computer
- or directly from within the device, but only since iOS 5, it is possible to upgrade the iOS version without the need to connect the iOS device to a computer (over-the-air update)
just go to: settings - general - software update
- so in your case try an update with a computer with iTunes installed:
- procedure with iTunes connected:

• Connect your iOS device to your computer using an USB cable. Wait for iTunes to open and connect to your device.

• Click on device button to the left of the iTunes Store button in the top right corner in iTunes.

• Hold down on the option key (Mac) or the shift key (Windows) and click the "Check for Update" button in the Summary pane. Browse to the .ipsw file you downloaded and select it.

• Do not disconnect your device until the update has finished.

• If necessary, restore your device from the previous backup and sync with iTunes.

Install iOS 7 0 4 update on iPhone or iPad Tutorial

For the iPad first generation (A1219) before iOS 5 to update is only possible with connecting the device to iTunes on a computer. Plug it into your computer and open up itunes under devices click on your ipad and then click on check for update.
- but this model supports only iOS 5
- NO iOS 6/7/8 !

iOS 6 .0