Backup and restore Android Settings and Application through ADB I would like to ask if it possible to backup and restore all Android Settings and applications through ADB.

I tried:

adb backup -all
adb: unable to connect for backup


It is not working, while all other commands are working.

Is it possible to use this bmgr ?
Make sure debugging is enabled and the device is connected.  Also, remember to actually select the "backup my data" button on the device itself (the device requires confirmation).  If you don't see such a screen on your device, you're quite possibly running a pre-ICS (&lt; 4.0) phone, which will unfortunately will not have the feature. 

Also, bmgr is not a solution for this-  It's a tool for testing apps that handle their own backups using the backup API by manually firing the "backup" and "restore" methods on the backup agent in the application, not shelling into the device and copying data to/from the development machine.