參考資訊：
https://xdaforums.com/t/recovery-safestrap-3-75-for-unused-partitions-preinstall-webtop.3023932/
https://www.internauta37.altervista.org/en/xt894-and-xt912-safestrap-375-unused-partitions-preinstall-webtop
步驟如下：
$ cd $ wget https://github.com/steward-fu/website/releases/download/xt894/VRZ_XT894_9.8.2O-72_VZW-18-8_CFC.xml.zip $ unzip VRZ_XT894_9.8.2O-72_VZW-18-8_CFC.xml.zip $ cd VRZ_XT894_9.8.2O-72_VZW-18-8_CFC.xml $ fastboot flash cdt.bin cdt.bin_patch $ fastboot reboot-bootloader $ fastboot flash emstorage emstorage.img $ fastboot reboot-bootloader $ fastboot flash mbm allow-mbmloader-flashing-mbm.bin $ fastboot reboot-bootloader $ fastboot flash mbmloader mbmloader.bin $ fastboot flash mbm mbm.bin $ fastboot oem fb_mode_set $ fastboot reboot-bootloader $ fastboot flash cdt.bin cdt.bin $ fastboot reboot-bootloader $ fastboot erase cache $ fastboot erase userdata $ fastboot flash logo.bin logo.bin $ fastboot flash ebr ebr $ fastboot flash mbr mbr $ fastboot flash devtree device_tree.bin $ fastboot flash boot boot.img $ fastboot flash system system.img $ fastboot flash recovery recovery.img $ fastboot flash cdrom cdrom $ fastboot flash preinstall preinstall.img $ fastboot flash radio radio.img $ fastboot oem fb_mode_clear $ fastboot reboot