BLOCK A NUMBER FROM TEXTING?

I have an Iphone 4s with telus and I need help really badly! I don't want this one perosn to text me anymore, they have iMessage too and I can't find out how to block it, Please Help

Call the company?!

Error 23: SMS Not Delivered - Sender blocked by intended recipient

or
Error 9883: This At&t subscriber is no longer available. User 00031 will no longer be able to receive calls/sms messages from you at this time.

I can safely assume you have text-messaging service as part of your wireless service with Telus.

With that in mind, download the Telus My Account app for your iPhone 4S from the appstore. Then go under the messaging services and then under 'text blocker' (or something like that), then input the number you wish to block and tap 'submit' or tap 'OK' button.

The number will then be blocked permanently until your wireless text-messaging service expires or is terminated.

Simply use some apps to black list a person. There are many apps to protect phone from virus and black listed people