Factors in all the rebates and free cash that you can get before you buy your next phone with att. Current AT&T users can help people swithing save some money using att's referral program that earns both parties a $25 at&t gift card.
It is limited to 5 referrals a year so you can not get rich with it, and it would make no sense to spam it. But you know decent amount for just to referral . So if you are switching to AT&T to get the iPhone, message an AT&T user your FIRST NAME and main E-MAIL ADDRESS and THEY will send you a referral. Once you are done with activating your iPhone, go to the link in the referral and fill out the form.AT&T will then mail you a free $25 gift card!!!
more info here:
https://referral.wireless.att.com/public/reward.jsp
FAQs:
https://referral.wireless.att.com/public/faq.do
Keep in your mind that BOTH PARTIES with get $25 each. Have fun