Today, mobile phones and texting make sense. In the US, more than 85% of the population owns a mobile phone, making them a big part of the more than 5 BILLION mobile phones being used world-wide. People tend to open their text messages: of the 97% that were opened, 83% of them were opened within 60 minutes. (Email has a low 20% open rate.) Overall, when considering all the benefits and options, texting is relatively high impact, low cost and low maintenance.
You can find out further details—plus ways churches are using texting— at this link.