Can anyone block any certain number from messaging on iPhone?

Yes, it’s true that you will be charged 20¢ for each incoming text message when you do not belong to a particular message plan which usually starts at $5 per month for 200 text messages. AT&T suggests that should you will be troubled in this way if you sign up for its AT&T smart limits for wireless, which will cost coincidentally, $5 a month. This is a major service mainly designed to manage children's use of a mobile phone by limiting it in innumerable ways. One of those important limitations is that you can block specific chosen phone numbers.Regrettably the negative point is that you can’t block all incoming text messages using Smart Limits,which means this will help you in a very little way unless these messages come from the same source and you can identify the number.

If the Smart Limits does not appear to be what you have been looking for, try calling AT&T and explaining the situation.luckily the person you speak with won’t spend all their time trying to sell you more services but they will rather find a way to block these messages.