Here's how I thwart safety screws, though I dunno how well it will work in your situation; the Torx Plus screws on an iPhone are smaller than the screws I've tried this with before
You'll need a hard plastic pen (Like a Bic Cristal) and a source of heat, but preferably not an open flame. Remove the ink cartridge and ballpoint; you're not going to need them for this.
Basically, the idea is to melt the plastic so that it becomes pliable enough to flow into the screw-head, cool, and act as a temporary screw-driver.
If you're going to be working with a particular type of Security Screw often, I recommend tracking down a proper set of drivers for it. But if this is just an exotic screw type that you encounter only so often, this makes a pretty good stopgap solution. I've used it to beat Security Torx, TP3's, and Tri-Wing screws when I encounter them.
The only thing I wouldn't recommend using it on is Spanner (Snake-Eye) screws.