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no it doesn't!! :D
Yes you can - it will just take slightly longer to charge.
Too many apps installed; try moving apps to S D card of your Android phone / device.
Yes, just transfer them to your SD card and place it in the new phone.
Yes the GT540 is a android phone. it is the new android 2.1 phone from LG.
keep pressing the back button until it closes.
Nope!
You can't uninstall the android market. But if you uninstalled updates then leave your phone on charge connected to wifi for a few nights to let it update again
It is an android phone.
Any phone classified as a smart phone, that runs the android OS, is considered an android device.
This mode is to keep the root rights if you are updating your phone. Otherwise you will have to root your phone after update again.
12 hours would be good.