And if you're feeling gutsy, you can float over to the xda-dev website where there is info on rooting the Sero 7 Pro as well as a few custom ROMs you can try, including one based on 4.3.1.. As B. Diddy suggested, however, it isn't for the faint of heart. You can screw things up if you aren't careful.
If that doesn't scare you and you want to learn, send me a message and I'll point you in the right direction. I have a rooted Sero 7 Pro with a Custom ROM on it and love it!
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