They get older to be teenagers. But the questions how about they ( our enemy) have anti-detect app in their phone, so they will use that to bother your detect . For example, our enemy find we request them t be friend, and they are very smart and knows our purpose, then they pretend to add us into their friend list , but they actually put us into their anti-detect listing, so they went to a game center for two hours, but we can only see they stay in library for 3 hours. How about that?:)