I'm currently a T-Mobile subscriber and I'm planning on switching to AT&T for the iPhone 4. My contract won't end til the first week of July so I'm planning on getting it between July 3-5. My mother currently works at McDonald's which could make us receive 18% off discount. Here's the breakdown: - $50.00 (First line) - 18% off = $41.00 + $9.99 (Second line) = $50.99 ^ I'm planning on taking the 550 minutes per month. - $30 Unlimited Text Messaging - $25 Data Plan (2gb) - 18% off = $20.50 $50.99 + $30.00 + $20.50 = $100.50/month ^ Not including tax. I'm planning on getting an iPhone 4 just for one line, and a regular phone for the additional line. I was wondering is there an additional charges that AT&T may charge besides the activation fee for the first month? Also, how long do you have to pay a month? Is it 30 days, like T-Mobile? Thanks.