A 12.2-inch "prosumer" tablet released in February 2014. Powered by a custom version of Android 4.4 KitKat.

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My unit is running on android 5.1 version, with AT&T sim.

It run on OS 5.1 with AT&T.

My question is, can you upgrade to the latest android versions?

Can you unlock,so I could use my t_mobile sim?

Thanks

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1) You cannot update to an official Android 7 or 8 release. Samsung simply didn't make one.

If you go to this forum, there are instructions where you can updated to a 3rd party version (which looks like the Nexus Androids).

https://forum.xda-developers.com/galaxy-...

2) I doubt that AT&T locked tablets. Take it to a T-Mobile retail store and have them try a SIM on it.

If it is locked, AT&T unlocks via this form:

https://www.att.com/deviceunlock/#/

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Thompson さん、ありがとうございました!
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