I have recently upgraded to the 4.1 system update, although these symptoms have been occuring before, on my 3.1.3 system.   To understand my problem, you have to first understand how other phones send text messages that have character limits on them. If a person wants to send a lengthy text message and their phone or carrier has a texting character limit set, for example 124 characters, then if you send a text with MORE than 124 characters that text will be split into 2 or 3 or 4 or however many sub-124 character text messages you need to send. Now before, I could receive “limited”, as I call them, texts without any problems. But lately if someone I’m texting has a limit set and I receive a text like this: “(1/2) blah blah blah” I SHOULD right away receive the second part of the text: “(2/2) blah blah” But instead I JUST get that first one, the 1/2 text messsage and I wait and wait and wait for the second part to come and it sometimes takes 5 to 10 minutes. During that wait time other messages from BEFORE in the conversation could be resent to me, or the same 1/2 text message will keep getting resent. I tried telling my friends to write in smaller messages so their phones won’t split up their message into 2 or 3 different ones but it seems that this problem still occurs, even with a single text message. I send a message, I get theirs, then i send a reply and then I get the SAME text message I received as a reply before, only 2 minutes later. And then it either gets repeadetly sent back to me or I don’t get any texts for about 10 minutes and then the text message I was SUPPOSED to get, finally comes in.   Now, is this an AT&T problem? An iPhone problem? My friends’ phones’ problems? How can this be solved?