Why can I receive text, but can't send them on my iPhone 4S?

I can't send SMS messages on my iPhone 4S, but I can receive them. My iMessage works and I can receive calls tho. My phone's upgraded to the latest update, my number is entered correctly, I turned my SMS message on, I deleted my google app so I wouldn't have the google voice problem, I've done the *5005* or whatever thing, and I've even called AT&T about it. They ran a case for me, but I still can't text. If anyone has any suggestions or helpful comments, please share.

Perhaps is the new version you upgraded… Have red a lot of reviews about it and many people have that issue. I suguest to try downloading an sms app from the app store might help.

  • Why don't I receive alerts or a notification when I receive a text and I already checked my settings? I adjusted my setting and even put the ringer and notifications on and put the volume and ringer on and I receive no alert, no pop up, alert or notification when someone texts me. Why? This is the iPhone X! I went to the cell phone/ carrier store and they didn't help me. They said to go to the apple store or check the settings. I already adjusted the settings. So what do I do now?
  • Why can't i send or receive text messages? I have an Iphone 3Gs, and just recently I have not been able to send or receive text messages from one contact. When I try sending a message it says "received" but when we talk through facebook or anything else they inform me that they never got the message, and its the same with their phone, I never get the messages. Its becoming a big hassle and I just want the problem fixed. Can anyone help me out?
  • Why can't my iPhone send or receive pictures in text messaging? My dad bought me the iPhone 4S unlocked. I got the prepaid service at tmobile which was 50$ unlimited talk text and web. I can't send pictures during text messages and I can't receive them. If someone sends me a picture I don't get it, it's just blank. The little camera icon next to the text area to type is light grey indicating I can't press on it. I can only send or receive during iMessage. Please tell me why this is happening.
  • Why can't I send/receive photos via text message on my iPhone? I have an iPhone 4S, which I bought unlocked and I use Straight Talk. I can't receive or send photos to contacts that don't have iPhones. Can anyone tell me why this is, and help me get it working?