Hi, attempting to send photos from an iphone to an ipad results in sporadic success with no obvious reproducible pattern. Failure takes the form of either a message, or no response, or invisible target device. What kind of technology is behind this? Some kind of asynchronous service? If this were windows etc i would expect to have to get my hands dirty with tech details, but this isn.t. It makes me wonder if apple isn.t just a load of sh*t now.