SMSC fix for Samsung Captivate
I was having the same problem! It sounds as if you were messing around in the service area using code *#*#4634#*#* or some similar code depending on your phone? If so, entering the SMSC # will not update/register in that location. I have a Samsung Captivate phone through AT&T, (obviously since that's who sells that version). I went in the actual message area....clicked on menu....well follow the steps below...I was up and running in less than a minute. If you don't have the same phone, it may still help...if not, I suggest going to the online AT&T question center, type in SMSC number and whatever phone you have and follow the steps...it's that simple.
Goal:
Access or Change the Text Message Center Number with the Samsung Captivate (i897)
Symptom:
Unable to Send Text Messages
Fix:
Samsung Captivate Keypad Layout
1. From the Home screen, tap Applications.
2. Go to and select Messaging.
3. Tap your Menu Key.
4. Tap Settings.
5. Tap Message Center.
6. Enter appropriate Message Center Number, then tap OK.
*NOTE- you must enter the + sign before the number and exactly as it appears below.
+13123149810
WA LA!.....easy as....well....selecting some options in your phone and entering numbers!