I just received an email from Samsung support about a firmware update for the Tab 3 7.0 T210, here is a little snippet from it!!!!

Thank you for contacting Samsung Customer Support.

Regarding your query, Ive checked with our software development team and there is currently no official UK release date for a newer firmware version for Galaxy Tab 3 7.0 devices.

Due to the nature of our software upgrade process, we are not able to advise a specific timeframe for any particular device to receive a newer firmware version.

Please be assured that were committed to continuously improving the experience for our customers and I've shared your comments with our software development team for their consideration.

I would presume from that, there will be no update in the coming months!!