Why am I not reciving texts?

I have an iPhone 5s and I got it about a month ago and I've never had any problems, but today I can't receive anyone's texts. Like I'll get them but I'll get them 30 minutes after the person sent them. I've restarted my phone many times and I'm getting frustrated over it. So what's the problem?

Thats happened to me so many times.

I get that sometimes on my iPhone 4s and it's usually because I go out of signal then back into signal and for some reason it can take anywhere from 5 mins - 1 hour to receive it.

Maybe there are network issues at your provider's end