My friend gave me an iphone but it is only under the telus network and im under bell. in order for me to switch my phone i was told to jailbreak the iphone so it would no longer be under telus and i could buy a bell simcard and use it. the phone as far as iknow is a 32gig iphone 3g 4.0.1.

How can i make my phone under bell or how can i jailbreak it? links and steps are very useful thx!