Hi there, I Like to upgrade in my I-Mate JAQ OS WM 5 TO OS WM 6,1 or 6,5 if its is possible.Please show me how to do this. Thank you, Aleksandar

Hi, I'm afraid there is no offical or unoffical ROM upgrade for your PDA yet (ROM is the place where the PocketPC operating system is stored, and each device model has a different ROM so sadly you cannot use any other Windows Mobile 6 ROMs with your device.). I am giving more details about this issue to make it clear. Still you can follow the forums time to time to check if someone makes a ROM for your PDA. Basic problem is unlike most of the PDAs, your PDA is a non-HTC based PDA. I hope this helps. You can still download some PDA software to use your device more efficiently (Most of the PDA softwares are designed for working on both WM5 and WM6, since your device uses WM5, you won't be having a problem.).
Details of your PDA: (http://www.pdadb.net/index.php?m=specs&id=587&view=1)
Unoffical ROM forum: (http://forum.xda-developers.com/showthread.php?t=349007)
Offical ROM website: (https://www.imate.com/Support_DeviceSupport.aspx?key=48fc9a97-1b91-4350-919d-b4dfdbcb6cbd&cmd=roms)