The Motorola Droid 4 xt894 and the Motorola Droid Razr xt912 have a lot of memory space unused splitted in two partitions: /preinstall : 600 Mb /webtop : 1,4 Gb /preinstall is the partition where are stored the preinstalled apps and /webtop is an abandoned partition that under Gingerbread was used for the webtop but since ICS has been abandoned. Safestrap is a great recovery for devices with a locked bootloader that uses the kexec for load a kernel and that can install a rom replacing the stock rom or in one of the four virtual slots that can be created in the internal memory. The use of the virtual slots is a great mode to untach the main system and to avoid to brick the phone but the virtual slots are slower than the real partitions of the main system, they can't be trimmed and they...
