I currently have a 5C and it works great. But before, I had a 4S and I found that the text messages would never be received unless I opened the messages app or unlocked my phone or waited an hour. This caused a bit of frustration as I rarely got texts on time. I figured it was just poor service.<p>But now, after I've spoken to a few friends and heard from others, it seems my delayed text message problem is something that seems to be a fairly common issue is in Pre-5 models.<p>I know this sounds a like a conspiracy theory, but might there be a legitimate reason for this happening? I don't have the technical knowledge to find out myself. Enlighten me!
I'm assuming you're talking iPhone to iPhone here since you didn't blame any other device.<p>If you are using text all the time and not iMessage, that may be a sign that your network connection isn't all that great.<p>iPhones generally require data plans, so why aren't you using iMessage? Are you using a SIM from a non-iPhone account? It's very strange that you'd even notice the problem since iMessage typically sends things over data if it can.. you must just not have data, or maybe it's turned off.<p>Supposing you don't have data bandwidth to speak of, your cell connection might be so weak, or if not weak, so overloaded with voice or other traffic, that the texts get delayed. SMS is very low priority traffic, and is subject to delays. If it's working better on a newer phone, that may be because that new phone has a more capable radio system.