Im not sure how hot. Just try using the hairdryer on it and then twisting it with your fingers which will loosen it, and then just slip a really tiny screwdriver in there to pry it off (it may bend it but it won't matter if you're getting a new one. I am not 100% sure, but I think the pearl being attached to the case was 'unique' to the UPO.
If that doesn't work, then to remove the bezel itself, just use a credit card or a tiny screw driver to pry it off. Start on one side and gently oift it, then go to the other side with another tool and then it will pop off.