Re: Sometimes delayed SMS
It very well could be your iPhone...i think the overall point here is to say that this isn't a common or "known" problem with the hardware, so your carrier network may yield the best direction in which to point a finger if that is your goal.
Originally Posted by vietalogy
As far as a fix, it's kind of hard to give you one really because again, this isn't something common enough to the iPhone 5 to have a place to direct you for a solution to it. You asked if this seemed to be a carrier or an OS problem, and the truth is, it's most likely not an OS problem since you don't have a large amount of people complaining of the same issue (as you would with any OS problem).