Why aren't my new contacts getting my messages?

[AC Question]

New people not getting messages

I have a galaxy note 5 and I have noticed that when I exchange numbers with people, if they text me first I clearly have their number, but if they give me theirs, and I text them first, they do not receive it. Ex. I put my number in a friend's phone, they texted me I got it. A friend put their number in my phone, I text them, nothing. What could this be?

 

[dpham00]

Re: New people not getting messages

Which texting app are you using?

 

[Devhux]

Re: New people not getting messages

If you text someone and they don't receive it, what happens when they text you? Does the message appear in the same conversation, or does it appear as a new entry?

I'm wondering if it's something like not entering the area code before the number you are texting.