I have an unlocked iphone. it was working fine and well until recently i started having trouble with my sms. i can send them but i only recieve some of them. i know people are responding but im not getting them. and now i keep getting " this accessory is not made to work with iphone would you like to turn on airplane mode to reduce audio interference? you will not be able to make or receive calls" but i get it when nothing is hooked up it just happens!? any help?