Hey ,i have never upgrade software on a Panasonic KX-TDA30 the Software Version 1.006 ,, can i save customers database and upgrade to latest Panasonic Version without having to upgrade to V2.xxx then V4.xxx ?? Also once upgrade to latest version. Can i download customers previous database programming from V1.006 ?? onto V.4.xxx?? Sorry another tech said no ,, which i think is wrong. Thks very tips.