I would not for one minute believe handtec on this 16GB model being sold SIM Free.
I also saw their advertisement a few days back and spoke with Chris Love at Clove about it.
He contacted Samsung to query this and confirmed what handtec are showing is not allowed under Samsungs contract to sellers.
Sellers can only sell the 8GB model SIM Free.
The 16GB model is going exclusively to carriers for contract.
I challenged handtec yesterday and asked them to explain why they were showing the 16GB model SIM Free.
Despite receiving a Ticket Number they have failed to come back to me with an answer.
Why don't you raise a Ticket Number with them yourself and ask the same question..... I and am sure Clove would be interested to hear their comments.