Question. Apple is trying their best to make it (more of) a crime to jailbreak their phones. Why would one want to compare a stock Nokia with a jailbroken Iphone?
The Iphone isn't ment to be jailbroken, Apple works against it, it's against the user agreement and they want to brand you as a terrorist for jailbreaking the phone... Some jailbroken phones have had side effects with being denied upgrades, if I remember correctly...
But jailbreaking isn't a feature, it's a crime. According to Apple.