How can I activate Siri on new iPad ? I just downloaded iOS 6.

Press and hold the Home button. Siri is enabled by default on all devices that support it, so usually you can just press and hold the Home button to start the Siri interface. The Siri prompt will appear, and you'll be able to speak your command or question.[1]

• If Siri doesn't start, it may be disabled or your iOS device may be too old

Say "Hey Siri" if your iOS device is plugged into a power outlet. When your iOs device is plugged in, you can say "Hey Siri" to launch the Siri interface without pushing any buttons.

• The iPhone 6s, iPhone 6s Plus, iPhone SE, and iPad Pro allow you to use "Hey Siri" without the device being plugged in.
• If "Hey Siri" isn't working, it may need to be turned on.

Ensure your iOS device is compatible. Siri does not work on older iOS devices. The iPhone 3GS, iPhone 4, iPad, iPad 2, and the iPod Touch 1st-4th generation do not support Siri. Even though these devices may be able to install a version of iOS that supports Siri, they won't be able to use it.

• Visit support.apple.com/en-us/HT201296 for information on identifying your iPhone if you're not sure.
• See Determine an iPad Model / Version for information on determining what model iPad you have.

I hope this response helps you out.
I wish you the very best of luck! If I can help you further, please let me know.
I'm available for longer billable discussions at https://www.6ya.com/jim_8a00509cb5f5d7e2
If I've assisted you, I'd greatly appreciate you taking the time to provide me with a favorable rating. Thanks so much!

1. Turn on your iOS 8 device (iPhone 4S running iOS 8 in this tutorial) by pressing the Sleep/Wake button.
2. Tap and hold the Home button to activate Siri.
3. Once the Siri is launched, speak "Download <App name> from the App Store" in the mic.

http://electronicshelponline.blogspot.com/

To use Siri, simply hold your thumb or finger down on the power button. You will hear a double tone when it is open. For Siri settings, go to Settings, General, then check for Siri either in the left hand menu (IOS 10) or on the right side menu.

Siri troubleshooting: Siri's not working at all on my device. Which iPhone/iPad models can run Siri? If Siri isn't working for you, the first thing to check is your model of iPad or iPhone - older devices can't run Siri, even if they update to a newer version of iOS. Siri is available on the iPhone 4s and later, on the iPad 3, iPad 4, and all iPad Pro, iPadAir and iPad mini models, and on the 5th- and 6th-gen iPod touch models. Plus the Apple Watch and 4th-gen Apple TV, of course Siri troubleshooting: How to turn Siri on If it's not working at all, Siri might be switched off. Go to Settings > General > Siri and make sure the top slider (next to Siri) is on, and green.

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

there are some core apps belonging to the iOS system and cannot be deleted like 'clock', 'calendar', 'contacts', 'facebook' etc.
--------------------------------------------------
core apps:
1) Airdrop
2) Apple Store
3) calendar
4) camera
5) clock
6) contacts
7) facebook
8) game center
9) iBooks
10) iTunes
11) mail
12) maps
13) messages
14) music
15) newsstand
16) notes
17) photo booth
18) photos
19) reminders
20) safari
21) settings
22) siri
23) tips
24) touch ID
25) videos

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

The original iPad 1 can't upgrade to iOS 6 unless you jailbreak it. I've attached a link to help you through the process. Hello iOS 6 goodbye iPad 1 Inject new life by jailbreaking it

depends on the iPad model you have:
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 !
---------------------------------------
for all other models:
There are two ways to update the iOS version of your iPhone, iPad, or iPod Touch - 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

New OTA Updates And Activation Feature In iOS 5 No PC Required

on a iPad 1.gen. iOS 6 is impossible:
this model supports only iOS 5 !
- NO iOS 6/7/8
- the processor is too slow....
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 !