Apple iPhone 3G
MMS on iphone - this should work
Can sent to tmobile, verizon etc see
http://iphone.macworld.com/2007/08/sending_and_recei ... »
Likewise have your friends send MMS to your iphone email appl.
A little different but works with my nokia currently.
The other reason to not use MMS, on my nokia anyway, is that it always takes my 1.3Mp image and scales it down to 640 x480 before sending via MMS. With email (and the required unlimited data plan) I can send full resolution images.
I think that is why MMS will be going 'bye-bye' in the future.
you have unlimited data on the iPhone by default. email uses data. AT&T charges more if you want more SMS/MMS, so if you use email you can go with the cheapest plan.
emails, however, go to internet servers where they are safely ensconced until you decide to peek at them. you can even check them from other devices, filter spam, use colors, styles, and html in many cases (no idea if iPhone supports this... yet).