Hi, I will be purchasing my iPhone 6S Plus (when it is announced & released) on launch day and I'm currently with T-Mobile on their Jump! plan. I'm aware that Apple has now allowed one to "Jump" at one of their brick and mortar stores. I would like to know how the process is to "Jump" and whether it is time-consuming or not. Is it a similar process as to purchasing one on a two-year contract. I'm afraid to to go and be clueless and lost. How would the current condition of my iPhone 6 have to be? Sorry for all the questions & I hope someone can help me out!