RootzWiki developer Hashcode has released his Bootstrap / Recovery for locked bootloader phones. So we don’t butcher his words read his quote below to learn more about Safestrap Recovery and watch the video below as well.
Safestrap is a Bootstrap / Recovery for locked bootloader phones. The goal is to avoid touching your primary system (I’ll call this “stock” system) and only flash or make large changes to another place on your phone that Safestrap treats as a “2nd system” (in this case, it’s a series of virtual ROM slots located on the internal emmc area: “/sdcard“). Once installed, you will see a “Splashscreen” giving you the option to hit “menu” to enter recovery. The recovery portion of Safestrap is now based on TWRP 2.6.3.x (a touch based recovery) and you can perform .zip installs, backups and restores here. The additional features I’ve added to TWRP are mostly located under the “Boot Options” menu:
Here you can create virtual ROM-slots (2 on the N3 due to partition size and internal space) for flashing ROMs. These ROM-slots allow for different sizes of /system, /data and /cache partitions. The defaults *SHOULD* be good enough for flashing the stock-bad ROMs.NOTE: The bigger you make these partition the less room you will have to make other ROM-slots.
You can activate a new ROM-slot by choosing the slot you wish to make active and then selecting the “Activate” button. Once active, you will see the “rom-slot#” up in the top of the screen shown in green. If you make the “stock” ROM active, then you can see it in the top shown in red.
Once a ROM-slot is active, all actions you would normally perform using TWRP are directed to that ROM-slot. For example, “Install” to flash a .zip, backup and restore.
For more information you can read up here:http://blog.hash-of-…w-to-safestrap/
Hit up the RootzWiki thread to learn more about Safestrap, download it and learn how to install it. And remember, these types of mods and installs are not guaranteed to NOT brick your phone. Anything you do with your device is your responsibility.