Will an AT&T iPad purchased from Best Buy US work in india? I am planning to purchase iPad Mini wifi + cellular from Best Buy. The Best Buy representatives were not sure it will work in India with different service provider or not.

They are selling iPad with the service provider locked with AT&amp;T or Verizon (as I was told, anyway).

If I purchase, from Best Buy, a wifi + cellular AT&amp;T iPad, will that work in India or do I need to buy an unlocked iPad from Apple store? 

I never have heard that iPads are locked. Are they?
There are 2 options.

First you will have to have AT&amp;T unlock your device.

Then you will need to find a provider in India that will support your device.

Alternately (but costly) is to open an International roaming account with AT&amp;T.

Check here:

http://www.wireless.att.com/learn/international/roaming/travel-guide.jsp?

Technically speaking, you device will work in India.

Check here

http://www.wireless.att.com/travelguide/coverage/roaming/step3.jsp?CIDL=356&amp;CTN=&amp;MNC=SHOP&amp;DID1=468&amp;DID2=&amp;devicenum=1&amp;STEP=3