Basic rundown, I have an unlocked iPhone 4S purchased directly from Apple. I'm currently using it in Japan with Softbank. I've noticed two annoying things about iMessage and I'm curious if this is unique to me. Most people in the US store their numbers in the XXX-XXX-XXXX format. If I do this I experience the following. I can compose a new message to them and it recognizes it as iMessage but once it is sent, it is not listed in Messages under their name but their number instead. Using 1-XXX-XXX-XXXX or +1-XXX-XXX-XXXX corrects the issue. Are people experiencing the same internal to the states? In addition, I had similar problems if I used the local format for Japanese phones. Example might be XXX-XXXX-XXXX would cause problems but +81XX-XXXX-XXXX works fine. Is everyone changing their phone numbers to international format just to make this work correctly? My biggest problem being that the messages in the Messages app don't show up at the persons name unless I format it internationally for both Japanese and US numbers.