You can't jailbreak it!
Yes. It is actually called rooting for Verizon phones.
No. You don't need to jailbreak it.
no
Yes
no you
yes, while on android OS 2.1, but after updating to 2.2+ it turns itself into a light sensor.
You cannot jailbreak an Android, jailbreaking is only for iDevices. You can do a similar process called "Rooting". This can be done with popular programs like KingoRoot and 1ClickRoot.
Samsung makes a variety of mobile phones. From the Samsung Galaxy to the newest Samsung Fascinate, there are many options to choose from. The following is a link to the official Samsung website, http://www.samsung.com/ca/consumer/mobile/mobile-phones/all-phones/index.idx?pagetype=subtype_p2
The Samsung galaxy Europa is awful. Buy the samsung galaxy apollo!
The Samsung Fascinate is an android powered phone which gives it quicker multitasking capabilities compared to the Apple iPhone. Both phones are top in their class otherwise.
no
The Samsung galaxy ace is bigger and better than the samsung galaxy Y I would recommend the galaxy ACE and recommend on Vodafone and O2