Comment Re: Yes more reliable (Score 2) 101
Not to mention SMS is not reliable. SMS messages are not guaranteed, they are delivered on a "best effort" basis. Your mobile network is free to drop them on the floor and not retry if your phone moves out of signal range, the network is congested, or any other reason they feel like. This is particularly prone to happening when messages have to go across network boundaries.
Obviously the person who wrote the summary was under the mistaken belief that SMS is designed to be reliable, just like lots of people believe that email is designed to be instant...