Root Samsung Galaxy S2 Skyrocket SGH-I727 running Android 4.0.3 firmware UCALC4

Samsung Galaxy S2 Skyrocket SGH-I727 owners who just flashed the leaked Android 4.0.3 Ice Cream Sandwich firmware UCALC4 ROM might have experienced losing root privileges on their devices. With every official update rolling out every now and then, rooting methods for past firmware tend to not work on newer ones.

Well, here’s some good news: Samsung Galaxy S2 Skyrocket owners who have upgraded their phones to the leaked Android 4.0.3 Ice Cream Sandwich ROM can now once again gain root access.

Check out the guide below to learn how you can root your Samsung Galaxy S2 Skyrocket running on Ice Cream Sandwich.

Warning

Rooting your device will void your warranty. We are not held responsible if anything should happen to your device while following the guide below. Proceed at your own risk.

Requirements

AT&T Samsung Galaxy S2 Skyrocket SGH-I727
Android 4.0.3 Ice Cream Sandwich running on your device.
Samsung USB drivers for your phone must be installed on your computer. (You can install Samsung KIES, which will also install the drivers.)
Temporarily disable all security software such as antivirus tools and Samsung KIES as they may interrupt during the installation process.

Instructions

Download the following files and save them to your PC:
- ClockworkMod Recovery for the Skyrocket (SkyrocketCWMrecovery.tar, 6.3 MB)
- Odin3 v1.85 (Odin3-v1.85.zip, 198.4 kB)
- Superuser 3.0.7 (Superuser-3.0.7-efghi-signed.zip, 625.2 kB)
Copy the Superuser ZIP file to the /sdcard directory on your phone.
Extract the Odin3 ZIP package into a folder on your computer.
On your PC, launch the Odin3 application by double-clicking the .exe file.
Power down your phone.
Hold down both the Volume Up and Volume Down keys on your phone as you plug it into your computer via USB cable. When the download mode screen appears, release the Volume buttons.
In the Odin3 window on your computer, the ID:COM box should be highlighted in yellow. If not, the USB drivers are the most likely culprit.
Click the PDA button and choose SkyrocketCWMrecovery.tar.
Under Option in Odin3, make sure only Auto Reboot is checked.
Select the Start button to begin flashing ClockworkMod Recovery to your phone. Your phone will reboot automatically after the process finishes.
Switch off your phone once again.
Boot into ClockworkMod recovery. You can do this by pressing and holding down simultaneously the “Volume Up”, “Volume Down”, and “Power” buttons until you see the recovery menu.
Select Install zip from SD card > Choose zip from SD card. Browse for the Superuser ZIP file that you copied to the phone and select it to begin installing.
Once Superuser has been installed, go back to the main menu.
Select “Reboot System Now”.

Congratulations! You have successfully rooted your AT&T Galaxy S2 Skyrocket SGH-I727 running on Android 4.0.3 Ice Cream Sandwich.

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Comments

harly

bad
http://www.linkedin.com/in/ablelawrence Able Lawrence

Thank you! for the news I have been waiting for a long time. (Had downloaded the UK version but decided to wait for the official release). Willl update once I get it. Now is not very exciting in India (Installed 4.1.2 on my wife’s Note)
- sadashiv mukherjee
  
  I have installed the spain rom previously, can i install the indian veraion?
http://www.facebook.com/PdecimalM Puneet Mittal

finally they launched it in India… i have started the procedure.. hope it will end up quickly and i begin to enjoy my whole new S2
- Ssg
  
  Yeah good luck with that if you think you are going to be getting a whole new s2. Well actually yes, it will be a whole new s2…one with battery eating issues and plenty of lag.
tanuj

its a disgrace that half of the population using I9100G are still waiting for an update while other half is enjoying jb.
- http://www.facebook.com/rakesh.naskar1 Rakesh Einstein Naskar
  
  yes am also using the G varient.. and update is not avalable in kies or OTA
  - aditya
    
    It’s frustrating seriously…don’t know how long we should wait for the update for the G varient :(
Vikram…

really….its a good news for Indian I9100 user..
darvesh

S2 1900g still wating
adellphos

Adrian, do you have some news of when Android 4.1.2 will be available in Romania?
Thx.
Raj

I got the update is now running. Im draining my battery after first flash. It feels smooth and fast :)
meidie

OMG.I updated mine. It’s really cool
Amber Mahajan

Finally India Galaxy S2 tested Jelly Bean…Delicious !!!
Dhairya

Thank you! for the news you guys rock!
hemant

i havent received it yet..is it confirmed news..??
- fahr3nh3it
  
  If your device version is i9100 then you should get an update It is not out yet for i9100G.
Arun

I have updated my s2 to jelly bean through kies….awesome experience.
- Balaji
  
  How to update through kies?? i am not able to update pls help me on this
  - http://www.wwelivetv.com/ Vijay Balaji
    
    Open Kies..then connect your S2 to PC. Then it will ask you to update to jellybean..then click update..thats it
    - Balaji
      
      No I am not getting such message
      - Vipul Kothari
        
        I am also facing the same problem
- Chintu
  
  After the entire download, I get a message stating that the device is not recognized, reconnect and start the download process once again… Any ideas pls…
  - http://www.facebook.com/prasad.tiruvalluri Prasad Tiruvalluri
    
    Do you have windows 8? If so, it will not work. You have to go to another machine with XP or Win 7.
    - Chintu
      
      Thank you… but my desktop is on XP only…. nd last night trials also failed pal…
- Manoj
  
  hows the battery life.
http://www.linkedin.com/in/ablelawrence Able Lawrence

Installed it. Installed Google Now (Search). Dont see much of an advantage yet.
- rahul
  
  I have also installed the Spain version. But not getting the indian update. How did you update with indian version?
sohail144

plz help is it ota or i have to update it via kies
- no rply
  
  try to update with Odin………… it also not gona void your warranty
Peeyush Malik

Having problem with my Kies software
even after installing latest version of kies it says that latest version of kies needs to be installed for firmware upgrade
- no rply
  
  dude y to wait so much ………… try Odin
- Shaiju Bhaskar
  
  Downloads offline setup file from samsung official site, uninstall kies from your pc, then restart the system. After that install the latest kies software you downloaded to your system, and your problem is solved.
balaji

how to update JB to my samsung s2 via kies… please let me know the steps
Achu

Got the update an hour ago..and my phone is saved from the stupid is update..thank you Samsung..now it’s working well
- Balaji
  
  How you updated??
  i am not able to do either OTA or kies(Latest version)
  - http://www.wwelivetv.com/ Vijay Balaji
    
    its available via kies
    - gaurav
      
      having problem while updating via kies …after completing 100 % in 6 min it shows error message..what is this …plsss help
      - nitin
        
        i have same problem man if u get any solution then share me
    - nitin
      
      having problem while updating via kies …after completing 100 % in 6 min it shows unknown error msg…plz help me what can i do
  - nishantsirohi123
    
    go to the Samsung service center with the bill
    they shall do it for free
    
    but they always hard reset your phone so please make the required backup
    - Balaji
      
      Thank you
- Abhijeet Kumar
  
  Hey Man..Please tell how you updated?
  I have not been able to update my Samsung Galaxy S2 (i9100) to jelly bean. I connected it to Kies. Kies displayed that a new firmware is available. I selected next. It says it is Jelly Bean Update. I proceed further .
  Kies starts downloading “upgrading components”. Its completed 100%. Then the completion window + Kies window disappear. I am trying to be patient that the update will proceed but its not proceeding any further.
  
  The handset is still plugged into my computer & connected to Kies while I’m writing this post. Two background programs are still running- AdminDelegator.exe & Native KiesPDLR.exe (checked in task manager on my PC). It has been more than 2.5 hrs since I started the update. There is no response from Kies. I dont know what is the problem. A simple update should not be so difficult. Kindly guide me how this update can be done. ( I have latest Kies, Samsung USB drivers, .net 4.0, latest MS visual studio installed. what else do i need?)
  - http://www.facebook.com/chennojusk Saikrishna Chennoju
    
    On the usb debugging … & install Adobe air . Codek player and proceed
- AB
  
  how’s ur battery life..??
sohail144

whn im trying to update ota a mesg is poping up, (access to the software update service is provided to users in order which they requested it.try later) what does it mean plz help
http://www.facebook.com/mohd.danial.75 Mohd Danial

singapore s.. still waiting..
http://www.wwelivetv.com/ Vijay Balaji

FINALLY!!! Jellybean for S2 arrives to India. Its Awesome, butter smooth. And now battery drains very very fast!!! haha but i don’t care about it…
Jeet

my jelly bean update process is stucked at 1% for last more then hour, is this happened with any one of you while updating S2 to jelly bean?
Sanjog Birla

i updated sg2 with jb 4.1.2.

it does not had the premium suite in it, like it was made available to sg3…
so no multi-window feature.
Also there is no option for customize on notification bar through smart setting option…

other, its working fine…
carmo

Updated to Jelly Bean over the air…some major changes and features….love the new UI..
deepak

Got the jelly bean update on my S2 after long wait. The interface is indeed buttery smooth. Far better than ICS which had lots of issues. The only headache is the battery. It is draining rapidly after the upgrade. Too many widgets on the desktop is killing the battery. Nevertheless the jelly bean upgrade is a big step forward and the android experience has never been better.
- salman
  
  to which area do u belong???? m from karnataka but i dint get any update so asked.
fahr3nh3it

No update for i9100G version of device yet. Just checked @ 1500 hrs, Apr 03, 2013.
manju

got updates with all s3 features incorporated super ……………………………
Sanjay Joshi

Did upgrade successfully but no multi-window feature. Also there is no option for customize on notification bar through smart setting option…

other wise better experience.
- NK
  
  u may get it in the last update in 4.2.2. If not then..u wont get it officially.. coz tht will be the last update
aditya

did anyone get the JB update for s2 india I9100G model
- sourav mitra
  
  Not me :(
  - adyboy
    
    hey! i got it today!
sushma yaralkattimath

When tried to update my phone,i got this message “Access to software update service is provided to users in the order in which they request it.try later”….I have samsung i19100…please help…
Please tell me is it good idea to update to jelly bean?
- http://www.wwelivetv.com/ Vijay Balaji
  
  Try updating tomorrow. their server might be busy. Jellybean is awesome..many new features..but battery is draining very very fast.
Nagendran

No Update Yet for I9100G
AD

When will S2 i9100g model get update in India ?
http://www.facebook.com/jagdish.malik Jagdish Malik

Got the update on my 18 months old phne through Kies on 4th April. Works fine. Best thing is that all my apps, mail settings, pictures and music were restored so the transition was smooth like butter. It was not so when I upgraded ICS from GB
- Manoj
  
  hows the battery life.
Gopal

I updated my s2 long back using odin. Feel is better than before. Optimise your phone apps to avoid quick battery drain. Have some issues like in email sync and notifications. Smart stay not working effectively…..
- salman
  
  is your phone working correct when connected through data service or has problems like unable to use online chatting apps such as whatsapp,nimbuzz,etc n even youtube.
- AB
  
  how did u optimise ur phone..??
  how long is the juice lasting now..??
sdk

Still dint get the update via ota on my gt i9100G model! :/
diya

i hav updated my phone n selected the option of restoring.since then it has been 1 hour it is showing retrieving data from samsung account.what to do now?
diya

got my phone update..n selected restore option ..since then it has over 1 hour it is been showin “retrieving data from samsung account..wat to do
- Anisha
  
  Hi i’ve been having the same issues… how did you fix it?
Apurva Wadekar

I Have Got My Update. Its Being Download But After completing 100% .. It Show An Error Saying’Software Update Fail.Try Again Or Do It Using Samsung Kies or visit the center” :(

and when i try to connect my cell phone to my lappy it shows Hardware Missing.
please help.
khalid shaik

hi guyz does jelly bean hits andrhra pradesh?am waiting 4 a long tym!!!
mandy

got it…installing!!
- khalid shaik
  
  4m were r u bro?
AB

updated to JB.. but battery got murdered..
anyone else having problems with battery life..??
if yes, did u get any solutions..??
- balamuruganp
  
  yes i have the same issue with battery
- Ashley
  
  My battery life dies so fast now, I even tried a battery booster app and it did not help. How else do I fix this? Or can I uninstall this update?
  - Manoj
    
    yes, you need to visit service centre to replace with ICS.
adyboy

finally recieved update for my s2 I9100G varient india….wait is over huh :P
- adyboy
  
  works like charm :)
ManasRonfhe

I am in India but have a UK phone model. No update received yet. Please help.
Meetpiyu

Jelly bean 4.1.2 vreat but due to battery drain i m back to my ginger bread atleast now batery lasting for a day
- poof1983
  
  redo the update charge it over night download easy battery saver set that up and make sure u turn on ur power save mode then restart ur phone by doing this i save battery 50% .
  - Manoj
    
    hope so i wil also download battery saver and will see the batter performance. power saver mode is on.
WR

Updated to JB. New features like Direct call, Pop-up play are working. But couldn’t find the ‘Smart stay’ option. Its suppose to be in the Display section under Settings. Anyone noticed this?
Casiopeian

I downloaded Jelly Bean update through Kies for my Samsung Galaxy s2, when I installed it my phone got stuck on the booting window and is not starting now x-( Hung up on that screen even when i remove battery doesn’t help. Can someone suggest?
- Anurag Nagori
  
  did you get the solution.. even I am facing this issue and not sure what to do..:(
  - Tarun Pillai
    
    Even i had the same problem. I went to the samsung store and got it fixed. Later when i asked them about the update they said dont update. It’ll make your device too slow!!! Can somebody please tell me what to do? Also i have the i9100g model.
kk

Got the update and its awesome but how to activate multiple windows on galaxy s2
Nishant

Hey guys please help me.
2-3 weeks ago my phone was showing update for JB. that time i didn’t update it.
but now it’s not showing “no update available”.Even in kies is showing that ics 4.0.4 is latest firmware.
- Jigs
  
  I am also facing the same problem…Can anyone please help?
- Jigs
  
  I am also facing the same problem…Can anyone please help?
poof1983

i like the update i just dont like how the text messaging looks. its hard to find what text is new and u must click on the text for the new text alert shuts off even if u replied. once i down load a batery saver i seen the a big savings on the power.
- Manoj
  
  hi did the battery life improved ? by what percentage ?
Vipul Kothari

Guys help.
2-3 weeks ago my phone was showing update for JB. that time i didn’t update it.
but now it’s not showing “no update available”.Even in kies is showing that ics 4.0.4 is latest firmware. Kindly help plz
Jaeraj Surve

Friends pls help me

I got a message on my Galaxy s2 for upgrade to 4.1.2. i clicked install on my phone Now its stuck on android logo….. i tried rebooting but still it the same….. pls help