Why isn't my iPhone sending text message?

So my iPhone won't send TEXT messages. IMessage works. Other people can send me text messages but whenever I try to send a message, it says "message failed to send" or something like that. I have lycamobile carrier and nothing like this has ever happened. I have restarted my phone and all of that. I changed nothing in settings.

Double check message settings 1. Settings 2. Messages 3. Make sure Imessage, Send As SMS, MMS Messaging and Group Messaging are all checked then retry

Could be carrier issue

  • Will my message be delivered if sent as text message on iphone? My friend said that she was having phone problems earlier today. My message was being sent as an imessage, but I guess she wasn't receiving everyone of them, just getting the notifications that they were sent to her but she couldn't read them. I then responded to her, but it was sent as a text message this time and i have gotten no response. I'm not as much concerned about her responding or not, I just want to know if she will receive the message.
  • Why isn't my Iphone sending picture messages? When i try and send picture messages my iphone says message send failure? Also, 3g isn't working.
  • Why could i have gotten a text message with no text box? Yesterday morning, I looked at my smart phone ( android) and I got a text from someone. I clicked on the contact's text and there was no message, no blank bubble, nothing. It just looked like one of us was getting ready to start a conversation but no message was sent. (Extra info: I may be wrong but I think this certain contact has an iphone.) What could cause this? I don't want to ask the person because it would be extremely awkward.
  • When I text other iPhones why is it sending as a text message? I have an iPhone 4 I was on AT&T and I just switched to straight talk. In my setting I have all the iMessage and everything turned on. Sometimes it will work whenever I text another iPhone but most of the time it won't. I have tried turning the phone off and back on. It's really irritating. If someone could help me that would be great.