So I recently rooted my Xperia T3 using KingRoot... It was successful, various root checkers didn't report any problems but I just can't delete any system apps, move, cut, anything. Was trying to do this with ES Root Explorer (it has option to make /system RW but it doesn't work), Root Explorer, even system apps removers. Titanium Backup also didn't make it. I tried using Total Commander and its remount function too. At last I tried to do this through terminal with " mount -o rw,remount -t ext4 /dev/block/platform/..." command and it just says "operation not permitted" As you can see I ran out of options (at least out of these I know). I'm still a noob so it's really possible that I'm doing something wrong. I'm using android 4.4.4, original from Sony. Thank you for your time!