Friday, 14 October 2011

Install Android 2.3.7 CyanogenMod 7.1 on Galaxy S2 (SII) I9100 Guide : Custom ROM/Firmware

CyanogenMod is no doubt one of the best custom ROM for any Android device. I was waiting for a stable release from CyanogenMod for Galaxy S2. Latest stable version of CyanogenMod 7.1 is having Android 2.3.7 Gingerbread with lots of tweaks and improvements. Here is the complete guide on how to download & Install CyanogenMod 7.1 on your Galaxy S2.

** Please note that CyanogenMod 7.1 is a Custom ROM and it will void the warranty of your handset. Install at your own Risk **

Prerequisite

  • Rooted Samsung Galaxy SII device. Check How to root your i9100 device rooting guide here
  • ClockworkMod Recovery which will be there on your rooted device
  • Download the latest Stable build of CyanogenMod 7.1 for the Samsung Galaxy S2 (SII) from CyanogenMod website.

Procedure

  • Place the update-cm-7.1.0-GalaxyS2-signed.zip file on the root of the SD card.
  • Boot into the ClockworkMod Recovery.
  • Once the device boots into the ClockworkMod Recovery, use the side volume buttons to move around, and either the power button or the trackball to select.
  • Select the option to Wipe data/factory reset.
  • Then select the option to Wipe cache partition.
  • Select Install zip from sdcard.
  • Select Choose zip from sdcard.
  • Select the update-cm-7.1.0-GalaxyS2-signed.zip file.
  • Once the installation has finished, select Go Back to get back to the main menu, and select the Reboot system now option.

The Samsung Galaxy S II should now boot into CyanogenMod.

** Installing a Custom firmware is a very risky procedure.. Do it at your own RISK.. **

We have given this procedure on request from readers. However if you are not a very expert user of phone, We will not suggest installing a CustomROM.

Source - CyanogenMod Wiki page

68 comments :

  1. No samsung Kies Air support
    NO GPS + maps
    NO LOCATION AND TRACKING
    NO GOOGLE voice search
    NO Social Hub to add more account like facebook to sync with contacts

    ReplyDelete
  2. @Ephram

    yes there will be no Google Apps... However you can download them and install

    ReplyDelete
  3. @MEGA

    I am aware of reboot loop problem while installing the cynogenmod but that is how it is..

    I always say on Galaxy S2 you really dont need a custom firmware until you need a very high customizable phone and you are a advanced user

    ReplyDelete
  4. so how to solve it? the reboot sequence nonstop for me

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  5. i tried the way u described but after the whole process my phone just dont boot...what should i do ?

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  6. @romee

    i know that is the prob with custom roms... dont get panic . first try to go clockmod recovery by vol up+ home+ powet button and restore ur firmware... if it doesnt work just visit ki3installation page and follow the procedure to get official firmware back.

    ReplyDelete
  7. ROMEE IS A KNOWN BUG YOU HAVE TO flash twice in order to fix the rom on the galaxy s2 the first time you do it. Obviously wipe data + cache and do a factory reset of your device(do a nandroid backup first) then wipe cache. after this install google apps and then reboot twice. after this FIX PERMISSIONS AND YOUR GOOD TO GO, its impossible that doesnt work fine this way.

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  8. i too face the reboot loop problem... for a successful flash you need to make sure that you wipe data and cache ..then flash twice.. to not reboot before you have flashed twice...

    ReplyDelete
  9. Did the twice flashing. Encountered bootloop.
    heard i need to force install CWM for ROMManager to work in using it to install CM :S

    ReplyDelete
  10. thanx guys....really thanx for the help.. now my phn is ok :D

    ReplyDelete
  11. This comment has been removed by the author.

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  12. I have root my telephone and overclock to 1.400Ghz is work fantastic in 2.3.3 but my cuestion is? Do i need to upgrade ? Do I miss some greates factures is the lates firewire? I wish answers thank you guys

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  13. Can i dwload that upgrade in my xxkE7 version?

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  14. no proxy setting option wlan ? plz do something !

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  15. applications dont work on proxy wlan !

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  16. The best ROM for ur rooted device rite now is CheckRom revolution 1.0
    get it from xda..
    i moved from the so called stable version of CM7 to this rom a week back and im so happy with its performance.. no reboots or FC's and a decent battery life of 16hrs ..

    -Ajay

    ReplyDelete
  17. please, does this version support Arabic language?

    .
    .
    please answer me....... thanks

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  18. yes it support Arabic do it it's wonderfull !!

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  19. phones not getting started!!!!! plz reply quickly !!!!!!

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  20. unable to install it

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  21. @devesh

    If you are unable to install you can anyways install official firmware again..

    Just browse through Dialandroid for required firmware

    ReplyDelete
  22. i want to install cyanogenmod 7.1 but after doing everything like u said ! my phone got stuck at the start onli like when the phone shows samsung galaxy s2 gt-i9100 n stuck !no progress after that !

    ReplyDelete
  23. @devesh

    its nothing but reboot loop...u need to reinstall.

    ReplyDelete
  24. i tried 2 times hw many times should i try ?

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  25. @devesh

    its a custom fw... i never preferred it.

    ReplyDelete
  26. Can now anyone say real way install cyanogen mod on sgs 2??

    ReplyDelete
  27. can i go back to the original android 2.3.3 ????

    ReplyDelete
  28. @Anonymous

    yes you can go back to any firmware... Just download it and install.. You can refer DialAndroid posts for the same

    ReplyDelete
  29. after rooting can i go back to the official android 2.3.3 ????????? and will my phone be detected by kies ???/

    ReplyDelete
  30. @devesh

    yes u can go back to official firmware..

    Phone wil be detected by kies but you will not be able to update firmware using kies

    ReplyDelete
  31. AFTER FOLLWING the above procedure my cell does not boot in to cynogenmod plz help :) thanks in Advance

    ReplyDelete
  32. @Anonymous

    what is the error... is it re booting again and again

    ReplyDelete
  33. I Tried this procedure 2 times, in the first time my phone was stoped on screen with a exclamation, on the second time I was made the same procedure but my phone works normally now.

    ReplyDelete
  34. all went well but i am unable to use the camera and it even takes time to load pics in gallery !!! help

    ReplyDelete
  35. @devesh

    Its a custom firmware and never expect any support from anyone... The only thing i can help you with is the camera interface on cynogenmod is totally different from Samsung firmware. Please explore little

    ReplyDelete
  36. can u give me the link of sum other custom rom ! which is gud n has no problemz !!! plz !!!

    ReplyDelete
  37. I installed a nightly build (111) from CM7 community... GS2... works like a charm however I can't get Gmail/Market to start. Rest, this one is the best.

    ReplyDelete
  38. Is is suitable rom for Uk version ...?
    i hav CF rooted s2 having .3 firmware now...

    ReplyDelete
  39. after installing cyanogenmod 7 to my galaxy s2, it wont boot and the samsung galaxy logo keeps on flashing instead? i need help asp pls.

    ReplyDelete
    Replies
    1. Thats called bootloop.. Have you done wipe properly... If not try all steps again

      Delete
  40. yes i did. infact it was rebooted but after that the samsung screen just keep on flashing.
    cwm won't work. when i press up volume, home key and power, it wont work, the samsung galaxy s2 logo just appear and keep on flashing.

    pls. help me

    ReplyDelete
    Replies
    1. Dont worry nothing will happen to phone .. :)

      Install stock ROM again.. and then CM7... Check for KI3 on Dialandroid..

      Delete
  41. is it kernel_zski3.tar? i tried it in odin3 it pass but the screen is just the same, keep flashing the samsung logo :(

    ReplyDelete
    Replies
    1. http://www.dialandroid.com/2011/09/install-android-235-i9100xxki3-on.html

      Delete
  42. i mean kernel_I9100ZSKI3?

    ReplyDelete
  43. sir i am worried, i don't what to do. the download of 19100XXKI3 is too slow.

    ReplyDelete
    Replies
    1. Dont worry... it may be slow... but nothing will happen.. have patience.

      Delete
  44. i can now go to CWM, do i have to repeat the same step in installing CM7?

    ReplyDelete
  45. can you please tell me how should be the proper swipe? i follow all the instruction but it stocked up.

    ReplyDelete
  46. E:Error in / sdcard/external_sd/update-cm-7.1.0-galaxys2-signed.zip
    installation aborted

    thats what it says.

    ReplyDelete
    Replies
    1. Please install stock ROM again and then so the CM process... But my suggestion try KPA ICS rom ... i am using it .. nice

      Delete
  47. pls tell me how to install stock rom?

    ReplyDelete
  48. It runs perfectly!!!! Finally I've found a stable cyanogen mod7 rom, thank you so much.

    I have to tell something you those of you who have troubles, you have to wipe cache and factory reset, and install the rom for two times, my first instal doesn't work, but them I try a second one and it runs!!!!

    ReplyDelete
  49. after i overclock my galaxy s2, it bootloops and this happened when i enter to recovery mode.

    Can u please help me? after i overclock my galaxy s2, it bootloop and cant restart it.when i go to recovery mode it says
    E:Can't mount / cache / recovery /log
    E:Failed to mount /cache (no such file or directory)
    E:Failed to mount / efs (no such file or directory)

    Please help me.

    ReplyDelete
  50. do this rom suport swedish language???

    ReplyDelete
  51. i was success to flashing this, but my android market didnt work ??would you help me please..

    ReplyDelete
    Replies
    1. just google the market APK file and install it manually

      Delete
  52. can i just flash it using odin ?

    ReplyDelete
  53. How do I flash anything if the phone is stuck in reboot loop?

    ReplyDelete
    Replies
    1. @ lappies

      if your phone is in bootloop then you can remove the battery and again goto download mode by vol down+home+power and flash any firmware using ODIN..

      Why dont you try MIUI... its good

      Delete
  54. Can someone please help me here? I have installed my old stock ROM but really want to try out CyanogenMod. What should I do before starting with the procedure as described above? I have tried the 7.1 stable version as well as the nightly build (111 & 116) from CM7 community but with all I get the reboot loop error and then I have to use Odin to flash CWM again or my stock ROM. Thanks in advance

    ReplyDelete
  55. Hello, as everyone here I got the reboot loop after trying to install CyanogenMod 7 on my SGS2 during all the weekend.

    The solution exists, read carefully this topic:
    http://forum.cyanogenmod.com/topic/38096-boot-loop-sollution/

    In my case I put the cm_galaxys2_full-116.zip then I reboot into clockWorkMod to install the update-cm-7.2.0-RC1-galaxys2-signed.zip
    Again, I had the reboot loop, but no worries, because with the following it was possible to boot CyanogenMod 7.2

    To resume it quick, (but please read the page on the link as well)
    Once in the reboot loop, you are at the step 7.
    [...]
    8.: dl the latest syah kernel from here: http://forum.xda-dev...d.php?t=1263838 But carefull not the Siyah-v3.x, it's for ICS, USE Siyah-v2.6.x for CM7
    pick the tar version, we gonna hit Odin one more time.
    9.: boot into dl mode (vol down, home and power), start Odin and load the syah kernel file to the pda field. Hit start and wait for the phone to start up.

    And voila! Your phone should boot into CM ok!

    ReplyDelete
  56. does baseband version affects this installation of this rom coz my firmware is xwkl1 but baseband is xxlpr i had installed ics rom earlier nw on stock rom

    ReplyDelete
    Replies
    1. It should not effect but still i will prefer to have stock GB then try it

      Delete