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110 posts

Master Geek
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Topic # 189415 29-Dec-2015 09:32
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I have a Galaxy S2 I installed Cyangenmod 10 with their beta installer all went well was using it for some time, and I fancied installing lollipop and it all went wrong from there it wouldn't load so after a lot of trying different roms with no success and restoring back to stock 412 a few times I still can't do it the only way I could root again was with iroot.  But it still won't let me use CWM or TWRP to flash again.  Would like to update again to a more recent rom.
Any help would be appreciated I have googled lots but just seem to be going in circles.

I have so called restored to stock but Samsung will not upgrade as the phone is not stock!

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1472 posts

Uber Geek
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  Reply # 1458384 29-Dec-2015 10:05
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CF-Auto root is the best way to get root.

CPU: Intel 3770k| RAM: F3-2400C10D-16GTX G.Skill Trident X |MB:  Gigabyte Z77X-UD5H-WB | GFX: GV-N660OC-2GD gv-n660oc-2gd GeForce GTX 660 | Monitor: Qnix 27" 2560x1440


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110 posts

Master Geek
+1 received by user: 3

  Reply # 1458396 29-Dec-2015 10:31
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Hi the phone is already rooted I have looked at CF-Auto-Root and the s2 gt i9100 isn't on their list.  Just trying to get back to 412 stock


1921 posts

Uber Geek
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  Reply # 1458397 29-Dec-2015 10:34
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Currently got CM 12.1 on my S2 and it works very nicely.

Make sure you do a full format under CM 11's recovery first and use nano-gapps

Sorry not sure how to get back to stock

Generally known online as OpenMedia, now working for Red Hat New Zealand as a Solution Architect for all things Linux, Virtual and of course Cloud. Still playing with MythTV and digital media on the side.

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Uber Geek
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  Reply # 1458433 29-Dec-2015 11:47
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My brother in-law got a korean S2 ages ago - it even had a TV tuner in it - didnt work anywhere but Korea and the phone had lots of Korean specific junk on it.

As he reckoned it wasnt that useful here in NZ I had a play with it and after giving up on trying to flash with odin I discovered heimdall 

Seemed a very reliable tool for flashing the S2 - I flashed the vodafone specific ROM onto the phone and it worked great - maybe give heimdall a try.

Nothing is impossible for the man who doesn't have to do it himself - A. H. Weiler

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Uber Geek
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  Reply # 1458507 29-Dec-2015 14:26
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no real point in going to stock as there isn't a stock lollipop from Samsung. If you do want stock go here and select the appropriate rom for your phone and telco and follow instructions at bottom of page its quick and easy.

You may have already been to XDA if not have a read and try what they are suggesting.

Could be your recovery is wrong or you don't actually have root access, have a look here first and follow the instructions

Galaxy S8


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