Are you asking if Indian Android phones can be used outside of India? If that is your question, and I'm not familiar with the Indian mobile market, but an Android phone could be usable outside of the country if it is unlocked, and if the network bands it runs on are also available outside.
An unlocked phone is when a phone isn't forced to be used with a certain network. It is available to be used with certain networks that accept these types of phones.
Android is an operating system that can be used on mobile devices, like your smartphone. Like your computer, your phone needs something to tell it what to do and that is it's operating system. The Android phone can be used like a normal phone with which you can make calls. You can also download apps for your Android phone. At www.completeguides.net/01_The_Complete_Android_Guide, there is a guide that cover many topics on how to use an Android phone.
If unlocked, then yes.
A cheap unlocked cell phone would probably be a used flashed phone. A flashed phone is a phone that is able to be used by other carriers. New ones wouldn't be cheap.
Yes, this term is often used for unlocked iphones.
Google play or android market
It means that it can be used by anyone.
An unlocked cell phone means that it can be used with any carrier. It does not have to have a contract; however, it can have a phone line on it. (any phone line, not just at&t, verizon, & sprint)
Yes it is possible to see if your phone is unlocked. You can borrow a sim card from someone who has a cellphone with a different service company. If the card works and the phone thinks its your friends phone then your phone is unlocked.
Hi, yes a at&t Sim card will work on any unlocked phone
no, not unless Cricket has changed their phone. You see T mobile has a SIM card and the only other companies that have that is AT&T . You can used an unlocked AT&T phone on T mobile or vice versa but not cricket