Ok, first of all - I'm not unlocking or planning to unlock my Softbank-purchased Iphone. It does what I want and I don't leave Japan enough to make it necessary. My question is this -- I have access to a number of used Softbank cellphones, mostly smartphones, which the users are either selling or have no use for any more. It should be as easy as taking out the SIM card from most Softbank phones, putting it into any other Softbank phone, and it will work. But Softbank says DO NOT, and you CAN…See More