Has anyone hacked the Panasonic call blocker?

[jpanhalt]

I have had a Panasonic KX-TGA710 call blocker (https://shop.panasonic.com/cordless-corded-telephones/cordless-corded-telephones-accessories/KX-TGA710.html ) for 2 weeks, and so far, it works great.  I have not opened it yet to see what memory it uses.

Has anyone done that to read the pre-programmed blocked numbers and potentially update them?  Can additional memory be added?

I do not like the big red "block call" button.  It seems a bit theatrical, but it works, and this model is a lot cheaper than other models.