One man says here
https://www.mobileread.com/forums/sho...256917&page=31
that his PB624 is running on latest W624.4.4.1485 But my PB624 has W624.4.4.1310 and no other updates are available. Official PB website offers .1310 as latest. When I wrote to their support page I got an answer that .1485 is the latest upgrade version and available via Wifi only. OK! But when I connect to Wifi, still no updates
Why? Does it depend on serial number or country or what? When I asked them I got a message they are happy I select their product!