*#7284# not launching phoneutil My tablet is not getting connected through USB.

It's showing me the error" "USB device not recognised"

On one forum I read to dial *#7284# and it will launch Phoneutil.

But in my case it's not working.
It seems that the code is specific for Samsung devices. Therefore, if your device is made by another manufacturer, it doesn't work (if the manufacturer hasn't added it specifically).