Install Android 4.4 KitKat Cyanogenmod 11 Custom ROM on AT&T Galaxy S2 Skyrocket SGH-i727 with the given step by step guide given below.  Samsung Galaxy S2 Skyrocket SGH-i727 was launched in November 2011. In the US, it’s carried by AT&T Wireless and Sprint. It supports 4G LTE Speed in many LTE supported areas. Along with that it has a dual core Qualcomm Snapdragon MSM8260 processor. Its CPU runs at 1.5 GHz, which is somewhat faster than the international variant. Android 2.3.6 Gingerbread was the first official firmware for this smartphone. But with several newly launched Android versions the users of this device were totally bored with its aging UI. This is where the third party android developers came into focus. They made many of the android users dream come true by developing several custom ROMs based on the newly launched android versions.

This time the most well known Cyanogenmod team have launched their amazing feature packed CM 11 ROM especially for Galaxy S2 Skyrocket SGH-i727 users. As this device has a much compatible RAM and hardware, all the features run well without any lag. Different KitKat features included in this ROM are refurnished home screen, new dialer app, new themes, low memory management support, new gallery, keyboard, security and system improvements, new customization and battery saving tweaks. If you want to experience the latest KitKat flavored CM 11 ROM on your Galaxy S2 Skyrocket SGH-i727 then proceed to the actual ROM flashing process given further.

Everything given below for flashing the latest Android 4.4 KitKat on your Galaxy S2 Skyrocket  is very risky and may cause serious or permanent damage to your device, if not done properly. Unfortunately if such thing happens, then neither we nor the Cyanogenmod developers will be held responsible for that. Although it is very rare that your device will get damaged but still it is better to follow to read and follow every step properly and without attempting anything by your own.

AT&T-Galaxy S2 Skyrocket i727-CM11-screenshots

This latest Android 4.4 KitKat CM 11 ROM is still in its working stage and therefore has chances of much bugs and issues in it. But no need to worry as with further stable updates all of them will surely get fixed. I first of all mention here that this Android 4.4 KitKat update given below for Samsung Galaxy S2 Skyrocket SGH-i727 is much risky and has a risk of permanently damaging your phone, if not done properly. So the noobs are highly recommended without moving ahead stop right at this point. This is because even a slight mistake can increase the risk of bricking your phone. If accidentally such thing happens then neither I nor the developers of this CM 11 ROM will be held responsible for that. Although I assure you that the chances that your phone will get damaged or bricked is least, but still I highly recommend you to follow every step given below correctly and without attempting anything by your own.

Note that this Cyanogenmod 11 ROM is only compatible for Samsung Galaxy S2 Skyrocket having the model number SGH-i727. Installing this on any other device or variant will result into unwanted outcomes or bricked phone. So confirm that you are having the same device as mentioned above. You can verify that from Homescreen–> Menu–>Settings –> About Phone.

Pre-Requisites:
  • It is recommended to confirm that your phone has a proper battery backup or not. It is must before performing any kind of flashing process. Lack of battery always increases the risk of interruption in the flashing process thus leading to further problems. So I advice you to charge the battery of your device at least up to 70%. You may use apps like Battery Notifier for the same.
  • Flashing of any ROM requires wiping of your entire phone memory which includes your Contacts, SMS/MMS, APN settings, Memos and Call logs etc. So a timely backup of all these things is necessary. You may also transfer your entire data on to PC for more safety.
  • Make sure that Samsung device drivers are installed on your PC so as to recognize your device when connected to PC. You can install them by installing Kies or  manually install them from the link given below:
  1. Download latest Samsung USB Drivers.
  • There is a folder named EFS folder present in your system directory which contains all your phones specific information such as the IMEI, wireless devices MAC addresses, product code, and much more. The backup of such a sensitive folder is must as during flashing it may get wiped. If by accident the data in it gets wiped, then this will make your phone completely useless & will no longer be recognized by your carrier. Refer our article to backup and restore EFS/IMEI data:
  1. How to backup and restore EFS/IMEI on Android Phones.
  • Make sure that your Galaxy S2 Skyrocket is rooted. Also ensure that you have installed a recovery like Clockworkmod (CWM) or TWRP before proceeding further. Refer this article for the same:
  1. How to Root and install CWM/TWRP custom recovery on AT&T Galaxy S2 Skyrocket SGH-i727.
  • (Important!) For flashing the latest Android 4.4 KitKat CM11 ROM you need to have the latest Custom recovery installed on your Galaxy S2 Skyrocket. If you haven’t installed it yet, then don’t worry just follow this steps given below:

Step 1: Download latest CWM recovery package from Here.

Step 2: Download Odin v3.07 from Here.

Step 3: Switch off your device and boot into downloading mode. For that press and hold Volume Down+ Home (middle) button + Power key simultaneously until you see a warning message. Press Volume up button to continue. This will make you land into downloading mode.

Step 4: Keeping the phone in downloading mode connect it to PC using the USB cable.

Step 5: Launch the Odin v3.07 software that you’ve downloaded earlier. You’ll see that the ID:COM section in it is turned blue with a random COM port number below it. Also an ‘Added’ message will appear in the message box window. This will confirm that you have properly connected your device. If this doesn’t happen then re-install proper device drivers on your PC.

Odin-v3.07-Galaxy S2 Skyrocket

Step 6: On the right side of Odin window you’ll see a PDA tab. Tick that and locate the .tar.md5 file which you’ve downloaded earlier (CWM package) and select it.

Odin-v3.07-PDA-Galaxy S2 Skyrocket

Step 7: Tick Auto reboot and F.Reset time option on the Odin window. Remember not to tick or un-tick any other options.

Step 8: Just click on Start to initiate the latest CWM flashing process. Do not remove the USB cable until the process completes. The phone will get restart automatically as the process goes.

Step 9: After successfully completing the process you’ll see a Pass message with a green background in the Odin window respectively. You may safely disconnect your phone now.

Step 10: To check whether the latest CWM recovery has been properly flashed or not, completely switch off the phone. Then boot into recovery mode by holding Volume up + Volume down + Power button simultaneously until the recovery mode appears. Select wipe data/factory reset option to wipe data and caches present. This will solve the boot loops issue.

Let’s move to the actual Android 4.4 KitKat Cyanogenmod 11 ROM flashing process now.

Procedure to update Samsung Galaxy S2 Skyrocket SGH-i727 to Android 4.4 KitKat CM 11 ROM:

Downloads:

  1. Download Cyanogenmod 11 ROM for Galaxy S2 Skyrocket SGH-i727.
  1. Download Google Apps (Android 4.4)

Procedure:

Step 1: After successfully downloading both the package files given above, connect your phone to PC using USB cable, enable USB debugging mode and transfer both of them (without extracting) on your phones external SD card. Remember not to place them in deep directories.

Step 2: Now disconnect the phone from PC and switch it off completely.

Step 3: Boot into recovery mode now. For Galaxy S2 Skyrocket, recovery mode can be entered by pressing and holding Volume up + Volume down + Power button simultaneously until the recovery mode appears. 

Step 4: Don’t forget to take a nandroid backup. Actually nandroid backup is the backup of your entire operating system & is much essential in case if this installation fails or some problem occurs, then you can easily restore your saved previous ROM from the CWM recovery.

Refer our detailed article for taking Nandroid backup:

  1. How to take Nandroid Backup of any Android Phone with 8 simple methods.

For taking a proper nandroid backup, navigate to the ‘backup & restore’ option on the recovery mode itself and on the next screen select ‘backup’ option. This will make a complete nandroid backup of your current ROM. Refer the screenshot given below for taking a proper nandroid backup.

CWM-backup-restore-screenshot-Galaxy S2 Skyrocket

Step 5: After taking a complete nandroid backup, return to the main menu of recovery and navigate to the ‘install zip from SD card ‘ option & select it. On the next screen select ‘choose zip from SD card’ option. This will show you all the files & folders present on your external SD card. Just navigate to the CM 11 ROM file which you’ve copied earlier and select it. Select ‘Yes’ option on the next screen to start the ROM flashing process. Be patient until the process completes.

Step 6: Select ‘wipe data/factory reset’ option followed by ‘wipe cache partition’ option on the recovery mode to clear all your data & caches from the phones memory respectively.

Step 7:  In the same manner, flash the downloaded Google Apps (containing Play Store, Gmail, Gtalk etc). But remember not to wipe data after flashing them.

Step 8: All the flashing processes completes here. Just restart your device by selecting ‘reboot system now’ option from the recovery mode. The first boot will take more time to start than usual.

Note: If you don’t like this ROM and want to restore back your previous Rom you can do that by simply going back to the recovery mode by holding Volume up + Volume down key + Power Button simultaneously. Select ‘Backup and Restore’ option and on next screen select ‘Restore’ option.

Success

Finally! The most famous and well known Cyanogenmod 11 Custom ROM based on the latest Android 4.4 KitKat has been successfully flashed on your Samsung Galaxy S2 Skyrocket SGH-i727. You may verify the same from Menu->Settings->About Phone. Many overwhelming Kitkat flavored features are waiting for you. Go check them out. But don’t forget to share your views and experience after using this astonishing CM 11 ROM. I have made this article very simple to understand, still if you come across any difficulty while going through the process then without hesitating drop your problem through the comments section below. I’ll provide an exact solution as soon as possible. Till then Enjoy! 🙂