The phone sat in the corner, unseen.
All their attention was on the rest of the room. Somewhere in here was something both portable and valuable that could be sold swiftly for ready cash.
Naturally, the most portable items were the least valuable, so this plan was already changing from a simple smash and grab into a deeper search. And with every minute passing, their chances of getting away clean with the loot were decreasing.
Decreasing to nothing, in point of fact.
Shortly after they broke in, the phone had made a call. Silently, that call had allowed the authorities to listen to everything that was happening, and find a suitable course of action.