I actually use Straight Talk (with their Verizon byop Sim card), all because Verizon has the best 2g, 3g and LTE coverage in Alabama. I keep forgetting that, unlike with Straight Talk, you can't use any unlocked Verizon phone on a plan, like I did the Desire 526. They frown on that.
I have no idea if using Verizons prepaid service will get you the tracking you want. BUT, I do know they make an app where you can pretty much track every step of the phones use. From text messages, Web pages visited, pictures being sent and received , and GPS location at all times. Of course I believe there is a monthly fee for such an app, but it could give you peace of mind for the first few months while your teen earns some trust.
Good luck with whatever you decide. Even using Verizon there are a BUNCH of great phones at 200.00 and below. (Using AT&T or Tmobile would give you more choices though)
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