> SMS is sent as a "Short Message Service" text, using your text plan.
> iMessage is sent as data (140 characters = 140 bytes) using your data plan.
>
> Thanks for the information. I didn't know that. I have unlimited text so I I may not have noticed it, although I did notice the change of colors and wondered where they came from.. Has this difference been going on a long time?
Since iOS 5 was released.
> If I use WIFI, I am using SMS is that correct?
iMessage can also use either cellular or Wifi.
> Even if I use WIFI, but I'm texting a non apple user is it still SMS? or is it I message.
You can only iMessage from an iDevice using iOS 5.x to another iDevice using iOS 5.x, and then only if both users have it turned on and configured (a one-time tack for each device).
> If one of my family members is on my contract with AT&T but uses an Android phone, are our messages not SMS?
Android cannot iMessage, so those will always be "standard" SMS text.
> If I am using the G3 network it becomes Imessage, is that correct and uses up the data plan?
Both iMessage and standard SMS texts can go over either Wifi or cellular (3G) networks.
> If I am using the G3 network when I am out of the house, but am texting to an apple user, is it still sms or is it imessage?
It could be either, depending on how the Apple devices are set up.
> Was it announced somewhere? When did this differentiation in texting start?
It was announced with the introduction of iOS 5.
> This is as easy to understand as my phone bill or cable bill.
I am surprised your phone and cable bills are this easy to understand.
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Jim Saklad mailto:jimdoc@me.com
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