Ever since yesturday I was having trouble only every other text would be recieved by my friends, then all of a sudden, they were texting me with "why havnt you replied" and I did.

- I sent 20 texts to 20 different people, only 2 people got my texts.
- I can make and recieve calls.
- My phone is updated.
- I have taken out the battery
- I have taken my sim out and used it on another phone, and could send and receive texts perfectly.

Other info:
- AT&T
- data coding: 7 bit


I don't know what else to do, this is so annoying!
Anyone help please?
Thank you.