Hi! I am new in this forum. I am from israel and I plan to go to US next week for 1 week only and I want to buy unlocked iPhone 6 128 GB space gray. If I want to use it back to israel using israel SIM card, should I buy the contract-free Tmobile, verizon, or at&t? I know they are suitable to Israel LTE bands. I also want to know the availability of the unlocked phones in apple store in US. Is it available in store or I have to wait for some days? I tried to order from apple store to pick up but it is unavailable from the store I want to pick up (new Hampshire area). I hope it will be availableat store when i will arrive. Why is it not possible to order ftom the online store the at&t contract free,for example? I hope you can help. Thanks a lot!