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.

Multiple reasons, they could have THEIR iMessage settings disabled, or one of you could be on the phone or using something else like skype, and making it so that you can't send it in iMessage form. If you know this is not happening, (FOR SURE), then the only other thing I can think of, is that it's a slight glitch and just wait for a software update.

You need data. So if youre not connected to Wi-Fi or have data with straight talk it will send as a text. Maybe the other iPhones don't use Imessage. I doubt it has to do anything with your phone most likely theirs.

Nothing to do with your phone as long as you have everything on.

  • 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.
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  • Why does my iPhone sometimes send texts to other iPhones as iMessages then regular texts to iPhones? Like when I send a text to my friend that has an iphone, it usually sends as an iMessage then it will randomly send as just a regular text and it will be green and not blue.
  • Why can my iPhone text other iPhones when my phone is disconnected? Today around 10am my iPhone got disconnected (hadn't paid my bill yet), I went to text my aunt (who doesn't have an iPhone) and the messages wouldn't send, 30 minutes later I texted my friend who does have an iPhone and I could successfully send and receive messages. And as of 9hr later, I was able to text another person with an iPhone. What's up with this? Not complaining or anything, just curious why it's happening.