The Register, (via Engadget Mobile) is reporting that T-Mobile UK is slipping unlocked iPhones to high-value customers in an attempt to keep them from switching to the exclusive UK iPhone carrier, O2.

It seems if you do indeed appear to be a big spender on T-Mobile, you just need to find a willing customer service rep, threaten to take your money and go to O2, and they'll slip you an unlocked iPhone (smuggled over from T-Mobile Germany, perhaps?). Apparently, however, they're limiting this to 150 units a week so as not to be too overt -- or called out to joust by angry O2 bigwigs.

Any UK readers nab one?