How to block someone from texting you on a iPhone 4S?

I have AT&T and I don't want to call customer service and go through that whole process are there any apps or any other ways that I can block a person from texting me?

There are many apps on the App Store which will help you block certain people you don't want to conversate with. Such as call blocker which will also block texts.Mr. Number is one of them. Just browse through the App Store

  • When you block someone from contacting you on the iPhone? What happens on the other end? Does the person trying to contact you get an instant reply message saying the number has been disconnected or is not in service? Or do they just try to contact you and you don't get the messages or calls so they think you're ignoring them? How does it work when you block a specific number in the settings on the iPhone?
  • What happens when you block someone on an iPhone 6, and they text you or call you? Specifically, does the phone keep ringing or does it say the call can't be made? Does the text deliver and just never show up on the receiving phone, or does the sender get a message saying the text can't be sent? (The other phone is not an iPhone.)
  • If someone were to block my text now number would it block my normal number? I was teasing my girlfriend on my text now and she blocked me and I tired calling her and texting her on my normal number but she won't reply and it only run once and hung up. She has an iPhone, would it block my normal number if she blocked my text now number?
  • How to block your number when texting someone on iPhone 4? Someone texted my friend and was trying to act like me but I don't know who it was. They were using a pinger number so it wouldn't let me call them. I have an iPhone 4 and I want to text them without them knowing my number. How can I block it if I text them?