Bell Canada released the Galaxy S2 HD LTE (SGH-I757M), which is a slight upgrade from its original Galaxy S2 GT-I9100M released the summer before, with now a bigger display and HD resolution. I have ported ClockworkMod (CWM) Recovery to the SGH-I757M, which allows you to make backups/restores of your device and also to flash custom ROMs and ZIPs.
(If you still don't know what ClockWorkMod Recovery or a custom recovery menu is, Google it or search XDA.)
WARNING! Do not flash this to a different device model from the one it's meant for - YOU MAY BRICK YOUR PHONE IF YOU DO. It will not work with the other Galaxy S2 iterations like the I9100, so don't try it with the Bell Galaxy S2 I9100M (non-HD). DO NOT flash it on the Asian variant of the GS2 HD (SHV-E120) either, as it uses slightly different internal hardware - the ROM will be unstable and the phone component will not work. If you are sure you have the CANADIAN Bell Galaxy S2 HD LTE (SGH-I757M), then click on the button below:
(For questions about ClockworkMod for the SHV-E120, contact skysbird on Twitter or GitHub. I will not discuss that device in my thread, it's not compatible with this ClockworkMod.)
NOTE FROM dsixda:
I SOLD MY SGH-I757M IN SEPTEMBER 2012. PLEASE DO NOT MESSAGE ME FOR TECH SUPPORT. DIRECT YOUR QUESTIONS TO THIS THREAD ONLY. STOCK FIRMWARE AND MORE ARE IN POST #3.
Go to the Dev-Host link above and navigate to the "Bell SGS2 HD LTE" folder, and then the "clockworkmod" sub-folder to access the files required for the following steps. Please read the installation instructions carefully.
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To install CWM Recovery:
- If you don't already have Odin, download it from the link above, and extract the zipped file to a folder. Ensure both the .EXE and .INI file have been extracted.
- Download the TAR file for ClockWorkMod Recovery (e.g. cwm_recovery_xxxx.tar, or if you want the version that uses finger touch input: cwm_touch_recovery_xxxx.tar). Do not extract the file out of it, keep the TAR file as it is.
- Turn off the phone
- Put it into Download mode by pressing Power and Volume Down at the same time. The device will vibrate and soon you will see a Warning screen, where you will need to press Volume Up to enter Download mode. (NOTE: You can also use the Galaxy S2 USB Jig to go straight to Download mode. I recommend you get one from eBay just in case.)
- While in Download mode, start up Odin and connect your phone to the PC via USB. You should see a status message in Odin saying your device was "added".
- In Odin, press the BOOTLOADER button and select the CWM TAR file you just downloaded.
- In Odin, press Start. Your custom recovery should be flashed completely in a span of a few seconds, and then it should say "PASS" in Odin. If it doesn't finish and is stuck, then your file was either corrupted during the download or there was an MD5 mismatch (this is not a regular TAR file, it has an MD5 signature).
To enter CWM Recovery:
- Turn off the phone
- Hold down the Power button to turn the phone on, and then immediately hold down Volume Up + Volume Down at the same time.
- The device will then show the word "Samsung". Let go of the buttons at the exact moment you see this.
- If you did it on time, you will enter CWM Recovery. Use the Volume keys to move up and down, and press Power to select. The capacitive buttons do this: Menu = DOWN, Back = BACK to main menu, Search = SELECT
- NOTE: If you had flashed CWM but are still seeing the stock recovery image, then click here for a solution.
- Make sure you make a Nandroid backup of everything the first time you use custom recovery. The backup will be stored under the 'clockworkmod' folder of your SD card.
- UPDATE: I sold off my device back in September 2012, so please do not message me for tech support. Use this thread instead, which is its intended purpose. Thanks!
To root your device through CWM:
- This step is only if you want to root the stock firmware that is currently on your device. If you are going to flash a ROM like CyanogenMod, then you can skip this section, since most custom ROMs already have root installed.
- You need to first download root_sgs2hdbell.zip from the Dev-Host site linked above. Copy it to your device's internal or external SD card.
- Then go back into CWM and flash the ZIP. You should now be rooted, you don't need to do anything else to your stock ROM.
Factory/stock firmware images, custom ROMs, change log, source code, acknowledgements, etc.:
See next two posts!