Galaxy S II Sky Rocket is currently running on Android 4.1.2 Jelly Bean and there is no word about its further updates by Samsung. Thanks to the developers over XDA who are best known for always bringing up the best stuff for our beloved Android smartphones. Android 4.4. KitKat based CyanogenMod 11 custom ROM for Galaxy S2 Sky Rocket is available now. A good choice for those who always like to get their hands on the latest and greatest version of Android using custom ROMs while its not available officially.
Well, CyanogenMod, the most popular custom ROM community is the aftermarket firmware distributor for Android that focuses on improving the stability and performance of the Android devices. In the following write up I’ve explained the method to install the Android 4.4 KitKat CyanogenMod 11 on Galaxy S II Sky Rocket by At&t and Rogers in simple and easy steps. Please keep in mind that this ROM is not for every day use, flash it only if you are familiar with Custom ROMs and if you know what you are actually doing. You just got to follow this guide to the letter.
Here are some pre requisites and pre cautions before we begin the flashing process…
Disclaimer: The methods involved in flashing custom roms and rooting your phone is highly custom and may result in bricking your device, and has nothing to do with Google or the device manufacturer that is Samsung in our case. Also rooting your device will void its warranty and you will be no longer eligiblefor any kind of free device services by the manufacturers/warranty providers. In case of any mishap we may not be held responsible. Follow these instructions to the letter to avoid any mishap or bricking. Make sure that whatever you do, you are doing it at your own responsibility.
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Here are some pre requisites and pre cautions, that you need to have before installing this ROM.
- This ROM is only for Samsung Galaxy S2 Sky Rocket. Do not try this on any other device. Check your device’s model in Settings>About Device.
- You must have rooted your phone and have installed CWM recovery. Follow our full guide here to do so.
- Make sure that you backup your current ROM using the Backup option in the custom recovery.
- Make sure that you make EFS backup of your device as well.
- If you’ve rooted your phone, use titanium backup and backup all your applications with data and system data. This is useful in case you wipe your phone and want to restore each and everything exactly as it was before wiping.
- Make sure that you’ve backed up all your important media content, contacts, call logs and text messages. This is highly recommended in case you need to wipe your phone during the installation process or something goes wrong.
- Make sure that your phone’s battery is charged at least over 60%. This is highly recommended in order to prevent any mishap during the flashing process.
- Alright! Once again, I insist that follow this guide to the letter in order to prevent any mishap.
How to Install Android 4.4 CM 11 Custom ROM on Galaxy S II Sky Rocket:
Install a Compatible Radio first:
- Download Radio for AT&T (Skyrocket) SGH-I727: UCMC1
- Radio for Rogers (Skyrocket) SGH-I727R: UXUMA7
- Place the downloaded Radio file on your device’s sd card.
- Boot into CWM recovery.
- Select “Install>choose zip from sd/ext sd card>select the radio.zip file”.
- Flash the file.
How to Flash the ROM:
- Download ROM CM 11.0 Android 4.4 KitKat
- Download Android 4.4 KitKat comaptible Gapps.zip file.
- Place the downloaded ROM.zip and Gapps.zip file on your phone’s sd card.
- Boot into custom recovery. To do so, turn off your device completely. Now press and hold Volume Up + Home Button + Power Key, you should see the CWM recovery. Do not use any other recovery except the one we linked above.
- In CWM recovery wipe data-cache-dalvik cache.
- Now in CWM recovery select “Install Zip>Choose Zip from Sd/Ext Sdcard>Select the ROM.zip file”.
- Select “Yes” and let the installation proceed. It will finish in a while.
- Now Once again in CWM recovery select “Install Zip>Choose Zip from Sd/Ext Sdcard>Select the Gapps.zip file”. It should flash Gapps in a few seconds.
- As soon as the installation is completed reboot your device.
- Phewww! You’ve successfully installed Android 4.4 KitKat CM 11.0 Alpha ROM on your Galaxy S II Sky Rocket.
- In case you are stucked on the boot screen, boot into cwm and wipe cache and dalvik cache and reboot.
That’s all. In case you got any queries or face any difficulties regarding the method explained above, feel free to stop by the comment box below. We will try our best to help you out.
This post was last modified on October 13, 2018 2:46 am
View Comments
The Kit Kat Rom fails to flash via TWRP Recovery. Where does the file originally come from?
@JTO655:disqus What error do you get? Have you also tried using CWM?
do we have to install the radio?
@disqus_8iv2j9EyuT:disqus no for this one you don't
do this rom have any mistake o failures?? does everything work (cameras, video recording, wifi, bluetooth,etc.?
@yesica_camejo:disqus we cant' guarantee anything as it's a custom ROM. Flash at your own risk in case it doesn't satisfy, you may go back to your stock firmware
My phone stays on the cyanogenmod screen while the arrow is spinning its been like that for 5 minutes now
@disqus_bd4QotJxDk:disqus boot into CWM and wipe cache and dalvik cache, it should boot into CM then. Good Luck.
I cannot get into CWM recovery mode to install gapps, I installed ROM CM 11 and phone is working, but not google apps. I used boot manager to install CWM. Now i can't even open boot manger. What are my next option. Samsung galaxy S2 LTE (SGH-i727R)
Vol up + vol down + power to get into CWM recovery mode.
Worked for me. Didn't know I needed some radio bla bla thing to flash. This article helped me.
Thanks.
When trying to apply any of the three updates I get the following messages:
Radio - "E:signature verification failed".
ROM - "E:failed to verify whole-file signature E-signature verification failed"
Gapps - "E:failed to verify whole-file signature E-signature verification failed"
Phone - Samsung Galaxy SII HD LTE I7272-R
Rooted via Kingo
Recovery Program - CWM and TWRP