Yes but make sure that whatever software you are using that it has hacked that updated before you do it
By jailbreaking it.
Jailbreaking will void your iPhone's warranty.
You cant without jailbreaking it.
Jailbreaking is free.
you can't.
Jailbreaking a phone is partially legal and partially illegal. I have a post regarding this http://www.techlucid.com/2013/11/is-jailbreaking-illegal-or-not/
Yes and it works pretty well for me
yes it is absolutely legal
It is okay to jailbreak your iPhone 3g. The only downside to jailbreaking your iPhone is that you will loose your Apple warranty.
No. Sorry.
Yes by jailbreaking your apple device
It is not illegal but will invalidate any warranty.