Why does my iPhone ring when I didn't actually receive a text?

It happens sometimes, my iPhone will ring as if I got a text, and then I check my inbox but I don't have any new texts. Does this happen to anyone else?

It could be a notification for FB, Kik, Twitter, etc and not a call ring.

Additionally to EIE's list it could be mail (this is likely if you have mail set up).

  • Why don't I receive alerts or a notification when I receive a text and I already checked my settings? I adjusted my setting and even put the ringer and notifications on and put the volume and ringer on and I receive no alert, no pop up, alert or notification when someone texts me. Why? This is the iPhone X! I went to the cell phone/ carrier store and they didn't help me. They said to go to the apple store or check the settings. I already adjusted the settings. So what do I do now?
  • Why does my iphone5 receive text messages twice? When my iphone5 is on the lock screen and I receive text messages, unless I respond or look at it right away I will receive the same text message a minute later. Does this happen to everyone? How can I turn this off? It's very annoying!
  • Why does my iPhone receive messages late when I'm in a group text? I have the iPhone 4s with 16g (I have less than a gig left of space) and am on T-Mobile. Every single time I'm added to a new group text, my phone delays all messages sent to me. Regardless of whether it's another iPhone or if they're on the same carrier as me, none of my messages get to me until an hour or so later. Is it because I'm low on space? Or is it T-Mobile (probably the worst carrier I've ever had by the way)? Or is it the iPhone software?
  • Why does my iPhone not make a sound when I receive a text from an unknown number? When I get a text message from a number that is not in my phone, my phone lights up and shows that I have a text but does not make a sound or ring. Can I change that somehow? I have an iPhone 5.