Originally Posted by
Jim P
The smarty handhelds get locked to your vin number when you apply a tune and it?s set in the smarty handheld that your vin has whatever you had chosen applied to the ecm, you can apply a tune with hp tuners or superchips or whatever without returning the ecm back to stock with the smarty. If you decide to sell your smarty handheld, to not be a dick, you should return back to stock with the smarty, which will un-marry it from your vin number, as long as it was never used for a UDC tune, and this can be done with another tune from another device flashed to the ecm. If you were to send it to smarty to get it unlocked, they literally just take an ecm, program your vin to it, plug in your smarty to that ecm and return it to stock.