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.

You can upgrade database once you have the latest programming tool
V5 was the highest version. If you have v4 system software and a newer tool
It could be a problem. Make sure you have the latest tool and firmware

Any further info will have to be done on PM
How to do it is not open forum information

You got PMed !