AT&T Unlock for use outside of the US

[Siarl]

Hi,

I was wondering if this device is usable outside of the US. I have no experience with AT&T software and their carrier locks, but was hoping someone could help me out here.
Would love to use this tablet

Does anyone know?

Thanks!

 

[blexen]

I unlocked it through at&t homepage. no problems.
but now when insert any simcards carrier it cant register to the network.
Im from germany.
Any help?
Thanks