IPhone text messages not coming through?

I have an iPhone 5 - at&t service. My brother (iphone 5) and mother (Samsung something?) text me all the time and I don't get it! I get messages from my cousin (she has an android - sprint). This guy told me today he texted me and I didn't get a message! Is there anyway I can change settings? Do I not get it because of ios7? Anyone have this problem?

Have you got ios 7 if so it could be a glitch which will be sorted soon but Ryan a reboot
Hold lock button and home button down keep holding these down passed the power off screen and wait for it to turn back on

Went to my local ATT store, they seem to be the only people that can actually fix anything…

  • Will Do Not Disturb on iphone prevent no call ID calls coming through? - 1 I have a really pesky robot call quite often my question is, if i put Do no Disturb on… Will the no caller ID number come through? As in, will it show up on my phone that I have an incoming call. I don't want any alert status to the no call ID… No screen change, vibrate anything at all Hope there's enough information to give me a correct answer.
  • Texts messages coming through slow on Iphone 5? I got the Iphone 5 for Christmas the other day and as much as I'm happy with it etc I've just noticed that all my texts seem to be coming through about 10 minutes late, or even later. I'm on O2 and it has nothing to do with the network because my friend is on O2 her texts are fine, I text her quite a lot and I always get her texts coming through a couple of minutes later. Is their any idea why this might be?
  • Text messages coming up as iMessages? When I try to text my friend who doesn't have an iPhone, it comes up as iMessage, so when I send it, she doesn't receive it. Why is it doing this?
  • How do you stop calls coming from one device coming to your device from iCloud (apple iPhone)? I'm 13 and i don't have a credit card so i use my mums account and since my phone and her phone has the same icloud, her calls come into MY phone and i've tried making a new apple id but it won't work so how can i stop it (i've already logged out on my phone) so how can i stop it?