SMS (Short Messaging Service) is the capability to send short messages (usually 160 characters) to another cellular phone. In the case of smartphones, longer messages are split up, and put back together by the smartphone. If a longer message was to be sent to a basic phone, then there will be multiple SMS messages. Keep in mind that even though a smartphone can put the message together as one message, you are still paying for multiple messages. This is important to note if you have a limited SMS plan. In addition, SMS is not secured. If you wish to send me a SMS message, you can send it to +1 4126829751.