T-mobile Netherlands unlocking all iPhones

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I just found out that T-mobile Netherlands have unlocked all iPhones since 12 January. Wish I'd known this when I recently travelled back to the UK, but very nice nontheless.

http://toestelhulp.t-mobile.nl/#/Apple/iPhone-4/Simlock-verwijderen/Simlock-verwijderen/1

Any other carriers doing this?