SMS remains a powerful real-time engagement channel. Too simple in today's advanced mobile marketing arena? No way. Text messages are read and acted upon, fast. While a typical email can sit for days, 90 percent of texts are read within three minutes—now that is unmatched immediacy. In addition, 98 percent of messages are opened. Can you say the same thing about your most recent email campaign? I can't. Better yet, SMS messages can reach any mobile device so your efforts aren't limited to smart phones.