Unlocked T-Mobile Samsung Galaxy Tab A T307U 8.4 - Samsung Galaxy Tab A series Questions & Answers

Hello,
I got Unlocked T-Mobile Samsung Galaxy Tab A T307U 8.4.
Provider: RedPocket.
The tablet shows 4 bars.
Trying to start using it.
Still cannot place calls.
It says "Check your phones and tablet to make sure Call & text on other device is turned on".
I would very much appreciate any suggestions.
Thank you.

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Sorry for my bad English! Thank you one million time:highfive:
May be you should flash some other rom which is not region locked like German, again very few users have a locked note so doubt you will get an answer over here
A suggestion try note 2 or S3 forum they are built similarly see if you can find a post on how to unlock it I am pretty sure it will work on this to (Warning dont flash S3 or Note 2 rom )

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