First time,I want to say THANKS !!!! to @Tasssadar because he's the creator and he helped me a lot !!!MultiROM is one-of-a-kind multi-boot mod for HTC One (international). It can boot any Android ROM as well as other systems like Ubuntu Touch, once they are ported to that device. Besides booting from device's internal memory, MultiROM can boot from USB drive connected to the device via OTG cable. The main part of MultiROM is a boot manager, which appears every time your device starts and lets you choose ROM to boot. You can see how it looks on the left image below and in gallery. ROMs are installed and managed via modified TWRP recovery. You can use standard ZIP files to install secondary Android ROMs and MultiROM even has its own installer system, which can be used to ship other Linux-based systems.
* Multiboot any number of Android ROMs
* Restore nandroid backup as secondary ROM
* Boot from USB drive attached via OTG cable
http://www.youtube.com/watch?v=SCYh14Zwl3s You can also watch a video which shows it in action.
It _is_ dangerous. This whole thing is basically one giant hack - none of these systems are made with multibooting in mind. It is no longer messing with data partition or boot sector, but it is possible that something goes wrong and you will have to flash factory images again. Make backups. Always.
Note 1: Your device must not be encrypted (hint: if you don't know what it is, then it is not encrypted).
MultiROM has 3 parts you need to install:
- MultiROM (multirom-YYYYMMDD-vXX-m7ul.zip) - download the ZIP file from second post and flash it in recovery.
- Modified recovery (TWRP_multirom_m7ul_YYYYMMDD.img) - download the IMG file from second post and use fastboot or Flashify app to flash it.
- Patched kernel - You can use either one of the stock ones in second post or third-party kernels which include the patch, you can see list in the second post. Download the ZIP file and flash it in recovery.
[b]You current rom will not be erased by the installation.
Download links are in the second post.
Go to recovery, select Advanced -> MultiROM -> Add ROM. Select the ROM's zip file and confirm
2. Other Systems
Unfortunately, no other systems are available as of now. But, MultiROM _theoreticaly_ supports them - the principle should be the same as on grouper, we just need the systems. That's why the options in "Add ROM" menu in recovery are there, but do not flash systems for old Nexus 7 (grouper)!
1. Primary ROM (Internal)
- Flash ROM's ZIP file as usual, do factory reset if needed (it won't erase secondary ROMs)
- Go to Advanced -> MultiROM in recovery and do Inject curr. boot sector.
2. Secondary Android ROMs
If you want to change the ROM, delete it and add new one. To update ROM, follow these steps:
- Go to Advanced -> MultiROM -> List ROMs and select the ROM you want to update.
- Select "Flash ZIP" and flash ROM's ZIP file.
MultiROM - https://github.com/oblikas/mr_device_m7ul
Modified TWRP - https://github.com/Tasssadar/Team-Win-Recovery-Project (branch master)
Kernel w/ kexec-hardboot patch - https://gist.github.com/Tasssadar/6733940