The big red flag for mobile development in the Overland Park headquarters was when TMO spent three years refusing to let the team rewrite the ancient and clunky flagship app, then blamed them because it wasn't a "world class" app or user experience. He actually said that to the entire company, then backed it up by bringing in an outside vendor to do the rewrite. Never mind the whispers about his prior association with that vendor company, which is bad enough.
Throwing under the bus the team who had been keeping TMO's apps afloat, even with the handcuffs on funding and a bizarre lack of direction, is a pretty large indicator that TMO wasn't interested in doing much more than selling itself to customers through marketing gimmicks, not solid engineering and products.