CyanogenMod 9 arrived on the Galaxy S2 some time in December and has been frequently updated since. In fact, a new build is automatically created every night with the latest changes applied to the ROM. For those of you who are unfamiliar with the name, CyanogenMod 9 for the Galaxy S2 I9100 is a port of the Galaxy Nexus firmware, IM74K, and is based on Android 4.0.3 Ice Cream Sandwich.
The CyanogenMod 9 ROM for the Galaxy S2 first started out as an experimental build, with a lot of issues and bugs. But, thanks to the concerted efforts and contributions from the development community, the ROM has grown into a much more stable build.
If you want you experience the latest nightly build of CyanogenMod 9 on your Samsung Galaxy S2 GT-I9100, we’ll teach you how to flash it on your phone.
This said custom ROM is compatible with the Samsung Galaxy S2 GT-I9100 only. You can check your device’s model number through Settings > About Phone. If your model number or device model does not match the Samsung Galaxy S2 GT-I9100, we highly discourage attempting to flash this ROM to your device as it may lead to bricking.
As always, the ROM is provided as is and with no warranties or guarantees. These instructions, too, are for educational purposes. Use them at your own risk and do not hold us responsible if you damage your phone by using these instructions.
There are several ways to upgrade your Galaxy S2 to CyanogenMod 9 (CM9) nightlies, depending on whether this is the first time you’re installing CM9 from another ROM or if you’re updating from an earlier version of CyanogenMod 9. Regardless, you’ll need a few things:
If this is your first time installing CyanogenMod 9 to your device or if you already have a different ROM on your phone, this is what you do:
If you’re already running an earlier version of CyanogenMod 9, you can update to the latest nightly build using the following instructions:
If you’ve never tried flashing through ClockworkMod Recovery before, or if you’re more comfortable flashing through Odin, you can use this method:
Congratulations! You should now be running CyanogenMod 9 with Ice Cream Sandwich on your Samsung Galaxy S2 GT-I9100.
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I rooted my phone with UnlockRoot, so I didn’t have Clockworkmod Recovery installed at first. I tried installing it with ROM Manager, but that didn’t work either (when I try to back up my ROM I get an error). So how do I install Clockworkmod Recovery?
If it matters, I’m on 2.3.4 stock.
Nevermind I just flashed CF-ROOT instead. :P
hi developer.. from yesterday i installed the nightly release 19 may 2012. now i have problems using the screen rotate . screen rotate gets stuck and i have to use my phone upside down. then i also tried with different previous builds…. but even in that as well i see the same problem….i feel even the proccessing performance has also come down……. please help me on this… waiting for your reply….
I am on samsung stock ICS rom firmware XXLPQ (4.0.3) that I flashed sometime back with odin. I am planning “noob-proof” odin 3 method (flashing CyanogenMod 9 Resurrection Edition) . I have two question.
1. Do I need to first flash a lower version XXLPB like you have mentioned? Or can I bypass the step and flash CM9 resurection edition straight?
2. If I do flash XXLPB, do I need to root it as well?
I just want to confirm it. I understand the steps are pretty clear but I am not a tech savvy user on the android side.