Why can't I find my SMS Message Center?

[AC Question]

So I'm using Samsung Galaxy Trend Duos and I suddenly can't send any text messages. I called customer service I was told to check the number installed in my message center but the problem is, I can't find it! It's not in the messaging app and it's not in APN. I searched every where for the past hour and I can't find it anywhere. I tried asking and consulting the internet but's mostly Galaxy S and Galaxy Note. I need help guys

 

[Golfdriver97]

Welcome to the forums. I found these:
I cannot send text (SMS) messages

I'm unable to send SMS (text) messages from my Samsung Galaxy smartphone. How do I fix this?

It looks like Message center is in the Text message app settings.