Important: If you´re not sure about something, ask and dont do it. Only apply this method when you´re a 100% sure.
I´m not responsible for things that happen to your device! It may be not safe. Everything is tested (so my device should be damaged first ^^) by myselfe but its your decission to actually use dualboot on your phone.
What you need: You need to understand the following lines and you need to have ~2gb free on your internal sd.
Rom requirements: Till now both roms have to be android 4.2.2!
Step 1: Download all files we need
- Go to the download page at team-blockbuster and download all files on the page
Those are: dualboot_setup_06042013.zip, greenblob-1.1-lts.zip, boot_to_sd.zip and boot_to_phone.zip.
Step 2: Understanding how it works
- Setup the system you want to have as second rom (the one on sd). Flash anything you want to modifications etc. (apps etc. can be installed later). A wiped rom is always better
- Flash dualboot_setup_06042013.zip. It copys all kernel related files needed to your current rom and pushes your rom to sdcard. Default rom to boot is the phone rom, not the created sd rom seconds before. You´re SDRom is stored in sdcard/SDRom/rom1. greenblob-1.1-lts.zip and reboot
- Now flash your second rom. This is the phone rom. Remember to flash greenblob-1.1-lts.zip after it! You would not run greenblob 1.1 with dualboot otherwise
You´re per default always booting to your phone rom. If you want to boot sd rom you can (theoretically) press home button when the Galaxy S2G starts to pop up. Its not really working yet thats why you need the files boot_to_sd.zip and boot_to_phone.zip.
Boot into recovery and flash the file boot_to_sd.zip to boot to sd or boot_to_phone.zip to boot to phone
Step 3: If you understood everything execute the instructions
Ask twice if you havent understand something! I hope this guide is easy to understand. For me its sooo easy as I developed these way to boot But its hard to explain.
I will improve the method on dualboot from time to time to make it easier for you
You can suggest features below