GSM is a type of TDMA, you are correct, not sure how that matters.
Read your own statement:
Quote Originally Posted by Buckrub View Post
And technically.........there's really only TDMA and CDMA.

GSM is just a type of TDMA.
What both of these do is have multiple services in the same radio bandwidth. The difference is how they do it, but it is still the same radio frequency. Yes, sms does not use the same amount of frames as voice but that is not what you said but probably what you meant.

Quote Originally Posted by Buckrub View Post
Europe? Like yeah, but who cares????
CDMA was developed in Europe, TDMA in North America, yet most europe uses TDMA.... I let you draw your conclusion.

Quote Originally Posted by Buckrub View Post
Back to the original statement.............text doesn't use the same bandwidth as voice, and takes less of it, so it sometimes works when voice doesn't.
Again, as I explained before, voice and sms works in the same CDMA or TDMA radio signal. The difference is sms takes lot less time to send a 10 lines text with 500 words total than what it takes for a person to:
notice their phone has signal.
dial the number.
the other person pick up the phone.
you say your 500 words.
Finish the call...

All of the above without interruption due to spotty signal....