The 8520 has OS 5, just like the 8900. It doesnt have "old" software.
if you need GPS, exchange it for the 8900.
If you don't keep the one you have.
You'll likely have less issues due to the trackpad not ball.
"That's it then. Cancel the kitchen scraps for lepers and orphans, no more merciful beheadings... and call off Christmas."