How to hard reset ipad air to recognise another apple id

by going to the appleid.com

Try hooking your iPad up to iTunes on your computer and perform a factory reset, changing the username and password.

if you know the email address just go to www.apple.com and you can reset there

Under this circumstance you may have to reset the iPad if you forget both Apple ID and its password.

To reset iPad without Apple ID, you need first put iPad into DFU mode and connect it to your iTunes. Your iTunes will help you to reset your iPad without entering Apple ID easily. Resetting your iPad with this method will result in wiping all the data in your tablet. The following steps will show you how to do that.

Step 1: Open iTunes on your computer and connect your iPad to the computer with a USB cable.
Step 2: After that, turn off you device. Press and hold the Home button for 3 seconds.
Step 3: Put your iPad into DFU mode: Press and hold the Power and Home button for 10 seconds. Then release the power button and keep holding the home button. When you see the Apple logo disappears, you have successfully put your iPad into DFU mode.
Step 4: When iTunes detects that your iPad is in recovery mode, you can restore it now.
Step 5: Click on Restore iPad. Then you will be notified after the reset and your iPad will take a restart.

After resetting your iPad with the guidance mentioned above, you'd better create a new Apple ID and password in time. After resetting iPad, you will get all the data swept from iPad, and you can restore the files from your iPad, iTunes backup or iCloud backup. However, you can't backup iPad to iTunes/iCloud without Apple ID before you reset your iPad . In this case, you need the third-party iOS data recovery software to help you recover lost data from iPad after factory reset without Apple ID.

http://www.leawo.org/tutorial/how-to-reset-iphone-without-apple-id.html

Generally speaking, you need the Apple ID to reset your iPad. iPad needs you to enter the Apple ID to switch off your account and the Find My iPhone service will be turn off. If you are using iTunes to reset your iPad, you need to enter the Apple ID when your iPad reboots.

But if you have no Apple ID or passcode, you will have to reset your iPad without Apple ID. To reset iPad without Apple ID, you need first put iPad into DFU mode and connect it to your iTunes. Your iTunes will help you to reset your iPad without entering Apple ID easily. Resetting your iPad with this method will result in wiping all the data in your iPad. The following steps will show you how to do that.

Step 1: Open iTunes on your computer and connect your iPad to the computer with a USB cable.
Step 2: After that, turn off you device. Press and hold the Home button for 3 seconds.
Step 3: Put your iPad into DFU mode: Press and hold the Power and Home button for 10 seconds. Then release the power button and keep holding the home button. When you see the Apple logo disappears, you have successfully put your iPad into DFU mode.
Step 4: When iTunes detects that your iPad is in recovery mode, you can restore it now.
Step 5: Click on Restore iPad. Then you will be notified after the reset and your iPad will take a restart.

After resetting your iPad with the guidance mentioned above, you'd better create a new Apple ID and password in time. After resetting iPad, you will get all the data swept from iPad, and you can restore the files from your iPad, iTunes backup or iCloud backup. However, you can't backup iPad to iTunes/iCloud without Apple ID before you reset your iPad. In this case, you need the third-party iOS data recovery software to help you recover lost data from iPad after factory reset without Apple ID.

http://www.leawo.org/tutorial/how-to-reset-iphone-without-apple-id.html

Follow these steps to reset your forgotten Apple ID password: https://support.apple.com/zh-cn/HT5787

You need to either connect the iPad to iTunes and select "set up as new iPad" or you could also reset your iPad by opening settings/general/reset and choose "reset all content and setings". Both ways will delete all apps and you have to purchase or reinstall them.

This needs to be reset by the Apple ID that first setup the Ipad. If you don't have that - you can take the Ipad to an Apple Authorized Service Center - along WITH a receipt or proof that you own the Ipad - and they can reset the device for you.

HOW TO CHANGE YOUR APPLE ID OR PASSWORD