Geeze, this MK3 just showed up on my doorstep with a customs agent's hand in my wallet.
I've been snagging XP5520's from Bell Canada and the unlock code is THE SAME FOR ALL IMEI's but only for Bell Canada XP5520's. That means some bloke would be selling these cheap and I just slap in another SIM, enter the code and I'm up and running on a different network.
What carrier are you using? I might be able to hook you up with one if it's compatible. I think that guy I bought the used handset for a hundred bucks still has two left. I figure that if I send you one it would cost around 120-ish dollars US including shipping.
Or you could bid for one like this:http://www.ebay.com/itm/Sonim-XP5520-BO ... 1e93218df0
(specs are incorrect in the item description, it's not a CDMA EVDO phone, it's WCDMA/UMTS/HSPA and quad-band GSM)
And I could give you the code.