Is the iPhone 5S T-mobile version full unlocked? Can I buy it and put any SIM?

I wonder if it is full unlocked and came with a T-mobile SIM. I mean, can I buy it, take out the T-mobile SIM and put any SIM i want?

In the apple store you can read iPhone 5S come with a T-mobile SIM and it also says that you can travel and use others carriers. But it says nothing about taking the T-mobile SIM out and use another one from the beginning.

Thanks.

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