Faith, which has about 80 stores in the UK, will use Mit's Midas technology to target its 50,000 customers who have opted to receive text marketing messages.
Mit's appointment, which coincides with Faith's website relaunch, enables Faith to handle its SMS activity in-house.
The retailer will use SMS to inform customers of new ranges. It will raise awareness of sales and promotions, including mobile codes and build customer loyalty by supporting the Faith VIP card.
Talin Vartevanian, Faith's head of ecommerce, said: "Our customers are continuously craving the latest sale offers and information from their footwear store.
"Adopting mobile and integrating SMS was the perfect solution for us. There is no cost to our consumers, with all being kept informed of marketing and promotional activity, as well as receiving exclusive offers to use online and in-store.
Rob Weisz, the commercial director of MIT owner Mobile Interactive Technology, said: "By licensing Mit's Midas platform, Faith's in-house team will have full control so that they can set up SMS campaigns and manage the frequency of their free-to-consumer SMS alerts services through our easy-to-use web interface."