We were surprised today by out of control Canadian SMS costs and had to put 21212 into the same one sided SMS mode that folks in the UK, Australia and elsewhere currently use (they can send updates but can’t receive). We posted first on our status blog.
Please understand that we did not mean to pull the rug out from under you if you depend on receiving Twitter updates through our Canadian shortcode. We would have preferred to take more time communicating this change but we had to act quickly and responsibly.
It’s clear we have work to do on our SMS offerings. Our long term goal is robust SMS interaction with Twitter around the world. Similar to our other reliability efforts, we can achieve this with the right focus but it’s not a quick fix. We’re focusing now and we’ll keep everyone updated as we make progress.