Its an Opt in world. People today are bombarded with marketing, from junk mail to spam email, they are constantly being sent things they have not requested. The mobile channel is different. Its different because people have to specifically Opt In. This is part of the reason that mobile marketing is so successful. People want to hear from you. Of course the other reason Mobile Marketing is so successful is that people text all day long. When their mobile phone buzzes with a new text they almost always read it, unlike those emails that go straight to junk mail.
Support for Free SMS Messages is generally excellent in the USA, but it may or may not always work, and coverage in other countries is limited.
If guaranteeing delivery of your messages is important, then it is recomended you use our premium, yet inexpensive, SMS network.