Ordered through Apple this morning, but like a lot of people here, I cancelled and went through CPWH instead (simfree space grey 16GB, exactly what I wanted for saturday delivery!). I was planning to go with 3 anyway, so locking to then isn't a problem for me. I'll probably still unlock later though - I can vouch for 3 in that case. It's £15.32, so cheaper than some others, and I believe they quote 2 working days (though my last unlock was done in less than 24 hours). You can unlock straight away on a PAYG sim as well, which you can pick up easily (and cheaply!) though I'm not sure about the topping up rules. In any case, I found 3 really good when I was unlocking before, and they have great tariffs, so I'll be happy to do it again. Only downside is the lack of 4G until december, but for the price difference, unlimited data packs and transfer to 4G at no extra cost, I'm happy to wait!