ADB remount failed: operation not permitted

After the T-Mobile system was recently refreshed, my G2 failed to execute ADB remount, prompting

Remount failed: operation not permitted

The solution is found on xda:

1. Check whether the phone is correctly connected.

ADB Devices

2. Go to Shell

ADB Shell

3. Enter the command in Shell (the # At the top of the command does not need to be entered)

# Su # Mount-o rw, remount-T yaffs2/dev/block/mtdblock3/system # chmod 777/system # exit

4. Then you have the read and write permissions of the system directory. For example, you can use ADB push to push the file to the system directory or delete the system file.

Http://forum.xda-developers.com/showthread.php? T = 685146