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?

Don't mean to sound like a smart A… But did you make sure the phone number didn't get switched? I've had that happen where somehow the phone number switched between two different contacts in my phone. Double check the number under the contacts name that you're trying to send to.

If that's all good I recommend turning you're phone off and back on.

Lastly, make sure you're connected to a 3G or Wi-Fi connection or data won't send out.

  • Why can't I send or receive picture messages? I have a unlocked iPhone 3G with t mobile it won't send or receive picture messages I had the same sim card in my other phone and it sent and received them so it has to be this Iphone how do I fix it or can I?
  • When I receive text messages with emojis from an iPhone, why do the messages only appear partially? My phone is a "Verizon Samsung Intensity II" slide phone. (Also it's blue but that doesn't matter.) Also, if I'm included in an iPhone group chat (spoiled rich friends, but not snobby…), I get each posted message as a separate message, so I'll end up randomly with 67 unread messages clogging up my inbox.
  • My new iphone5c won't send or receive text messages? I just got my iphone 5c shipped to me because I went to the Verizon store and ordered one. I've set up everything else… How do I set up being able to send and receive text messages?
  • My New iPhone 4 won't send or receive text messages? I have checked the service centre number which is correct, I have updated the ios software thing (I'm not too clever with Apple products but yes it's been updated).It says iMessage is waiting for activation but it has said this for ages now. I have tried absolutely everything with still nothing. I can make calls, use the internet, I can do everything else! I just can't send or receive text messages… Will someone please help me?