I'm planning to sell my ipod touch for an iphone. I've jailbroken my ipod touch and seen iphone applications/ tools/ and what not for iphone in the installer and there's like Caller ID and like ringtones. I was wondering, if I don't have like caller ID on my cellphone plan, but I download it in the installer on my iPhone, will it charge me on my phone bill for caller ID? I'm kinda confused with it. I watched a video on youtube where a girl got a 300 page phone bill from AT&T on her iphone, and I was totally shocked. Also, I don't have free internet access on my regular phone, but theres access to internet on the iphone, if I got on safari will it charge me? There's also voicemail... do I have to pay for that too if I install it from the installer?