It would really depend on where you are but arriving at 7:30 and expecting to be out in 2 hours doesn't seem likely. By that time the line could already be really long and you would wait for hours. I live in central Kentucky. Last year I arrived at midnight and there were 20-30 people in front of me. I still managed to get out of the store with my phone by 8:30, but I guarantee anyone that got there at 7:30 arrived to a line wrapped around the side of the mall and waited longer than 2 hours. You'll probably need to go earlier than you are planning to, otherwise don't bet on getting out by 9:30.