Nothing really "happens". You still have the same phone but just not Android Jelly Bean. Your phone company may release an update for you or a custom ROM may have been created online.
Yes the GT540 is a android phone. it is the new android 2.1 phone from LG.
Nope!
It is an android phone.
Any phone classified as a smart phone, that runs the android OS, is considered an android device.
Check under software settings to make sure an update isn't already available. If there isn't search around for a developer created ROM running Android Jelly Bean that you can download. Keep in mind that these are not official and might brick your phone. Read all the instructions before you download.
Yes. It is an Android phone allowing your smartphone to have the android market and so on. This phone is a great phone so come on and try it!
Android
it is an android
It's an android phone. Which includes android market lol. Every android phone includes market :]
No it doesnt. imessage is just for iphones..but there are plenty of messaging apps on the play store that are much better than imessage and can be used to instant message anyone (windows phone, ios, android, etc.)
HTC Dream was the first phone launched by Android
It's a windows phone rather than Android.