yes
yes
The Samsung galaxy s2 unlocked
Definitely yes.
You can - but - it will only work if the t-mobile phone has been unlocked !
Generally, No. Although if you purchase the phone unlocked, you can use it with a Verizon prepaid plan.
You can not make phone calls without a carrier. You could theoretically make skype calls if it has Wi-Fi.
what is an unlocked cell phone
Nope - Find some other device, an unlocked phone would be better.
The "Motorola Droid A855 CDMA QWERTY Android Touch-Screen Smart Phone", "Kyocera Rise Android Phone", and "Sharp FX Plus GSM Unlocked Android Touchscreen Phone" all have very positive customer reviews on Amazon and other review sites, and are at the top of the page in terms of customer ratings.
Yes the GT540 is a android phone. it is the new android 2.1 phone from LG.
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.
It is an android phone.