I had my 4 jailbroken for 2years never had a issue. And whats up with the warrenty crap you speak of? I guess if you are stupid and say " yaaaaa my ummm dag gum iphone was jail broken" they might not cover it. I like my 5s and all the other iphones I have had, I use it to call, pandora, text and look at weather and internet. No need for all the other bullshit, only reason I had them jailbroken was for the unlimited pandora skips .