Well today is my 31st day on my unlock 16gb iphone. I am going to call tomorrow and cancel my service. I had a couple of questions. 1. Will they ask why I am canceling? I saw somewhere that I could try the phone for 30 days no questions...is that true. 2. Will they bill the ETF or do I have to pay up front? 3. Should I call today or wait til tomorrow? Does the extra day make a difference, I just don't want to return the phone. 4. Will I be able to buy the new iphone in July, If I decide to? Any help would be great!