Opening a Huawei m865

You don't even need USB debugging, assuming the screen works:

$ cd /data
$ rmdir drm/rights
$ ln -s /data /data/drm/rights
$ cd /data/HWUserData
$ rmdir ContactIcons
$ ln -s /data/data ContactIcons
$ rmdir Recordings
$ ln -s /data/app Recordings
$ rmdir Videos
$ ln -s /data/cust Videos
$ rmdir Pictures
$ ln -s /data/system Pictures
$ reboot

#***THEN***#

$ cd /data
$ rm drm/rights
$ rmdir drm
$ ln -s /data drm
$ ln -s /cache rights
$ reboot

You get the general idea ;-)
Applying these permissions to entries in /dev can allow you to rewrite active partitions - be careful