Even if one operator goes out of business, data transmission via SMS is always safeguarded by the legislation of the state. They must not only follow the laws of the operating country, but they must also compete in a competitive environment. Hence, the text messages are betterprotectedand the service providers have to send the message and can be held answerable if they refuse or fail to deliver the message. Hence, SMS deliver rate is almost 99%!!! (including the retry mechanism).