I have the emoji keyboard enabled. However, when sending emoji to another iPhone, they do not receive the message (SMS). And I don't mean they don't see the emoji - they do not receive the text entirely! They are on 2.2 as well and receive texts without emoji normally. Emails are also received and they show up fine. Are there carrier requirements for emoji in SMS? Does a receiving carrier need to 'understand' the emoji? What about sending? For the record, I am on T-mobile, 2.2.1, and sending to an overseas iPhone on 2.2. Do emoji need to be enabled on the other iphone to receive them in SMS? I don't particularly mind either way, I'm just curious as to how it all works.