It's no secret that the US wireless market is saturated, and that most people who want a mobile device have already purchased one by now. Naturally, this means that the national players in the industry are looking for other points of revenue to aid future growth. AT&T is proving that it's one of the most successful in this venture by announcing today that it's activated a heap of connected devices last quarter -- to the tune of 1.3 million. That's a healthy number, especially since the company accumulated only a tenth of that in the previous quarter. This genre refers to a wide range of gadgets that come with an AT&T SIM card inside, but the most interesting part of this announcement is that over 500,000 of those activated devices come from connected cars.