Need help installing cm 12.1 - General Questions and Answers

I have a rooted samsung galaxy grand i9082 running stock jellybean 4.1.2
I tried installing cm12.1 and gapps using cwm recovery and it installs successfully.
But when I reboot system I am stuck on samsung gt-i9082 bootscreen.
What should I do?
I have done all the wipes before installing.
Please help me!!!

prathvik said:
I have a rooted samsung galaxy grand i9082 running stock jellybean 4.1.2
I tried installing cm12.1 and gapps using cwm recovery and it installs successfully.
But when I reboot system I am stuck on samsung gt-i9082 bootscreen.
What should I do?
I have done all the wipes before installing.
Please help me!!!
Click to expand...
Click to collapse
i dont have any experience with your device, but you may want to review the roms thread and see if they mention upgrading the bootloader and/or modem. cm 12 is a good bit newer than what you have on, and those things commonly need to be upgraded.
check before you try it and ensure you need it or not, im just stating general facts

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[Completed] I have flashed nameless rom android 5.0 and its stuck in boot loop

I had Archdroid installed in my phone .I have flashed it with nameless rom android 5.0.My phone model is GT-I9300 Samsung galaxy s3. Every time I wipe all data,and catche and flash this new rom its stuck in, boot loop.I tried installing nameless rom android 4.4.4 and again flashed it without wipe everything ,still its stuck in boot loop.I just wanna install this rom and want to get that awesome lollipop android 5.0,no matter what !!.Developers help me out guys!!!I want it so badly
XDA Visitor said:
I had Archdroid installed in my phone .I have flashed it with nameless rom android 5.0.My phone model is GT-I9300 Samsung galaxy s3. Every time I wipe all data,and catche and flash this new rom its stuck in, boot loop.I tried installing nameless rom android 4.4.4 and again flashed it without wipe everything ,still its stuck in boot loop.I just wanna install this rom and want to get that awesome lollipop android 5.0,no matter what !!.Developers help me out guys!!!I want it so badly
Click to expand...
Click to collapse
Maybe you have to stick to the installation instructions of the ROM you want to flash.
Please ask in the ROM thread, or in the [HELP THREAD] Galaxy S3 Ask any question. thread.
There you will get quick and proper help.
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[Completed] My t999 s3 doesnt want to install cyangenmod

i had cm10 installed but after a few months of problems i decided to upgrade to cm11. After trying to upgrade to twrp 2.8.3 something happened then my cyangen was tripping balls so i went back to stock s3 4.1.3 by flashing with odin. Then i rooted my s3 again using odin. Then i installed rashr and installed twrp 2.8.3. Then i booted into twrp 2.8.3 and before twrp loaded it had the cyanogen logo on it.Then did factory reset and the davik cahce clear thing. Then i proceeded to installed cm11 20141112 snapshotm12 and gapps kk20140606 but when i rebooted my s3 in still goes into the stock andriod what is going on? i tried to install cyanogen mod from a different sd card and i have no luck
eric95204 said:
i had cm10 installed but after a few months of problems i decided to upgrade to cm11. After trying to upgrade to twrp 2.8.3 something happened then my cyangen was tripping balls so i went back to stock s3 4.1.3 by flashing with odin. Then i rooted my s3 again using odin. Then i installed rashr and installed twrp 2.8.3. Then i booted into twrp 2.8.3 and before twrp loaded it had the cyanogen logo on it.Then did factory reset and the davik cahce clear thing. Then i proceeded to installed cm11 20141112 snapshotm12 and gapps kk20140606 but when i rebooted my s3 in still goes into the stock andriod what is going on? i tried to install cyanogen mod from a different sd card and i have no luck
Click to expand...
Click to collapse
Do you mean this unofficial CM11: [ROM][4.4] CM 11 Unofficial - Beta 7 11-22-13 (Discontinued due to new device)?
Or this one: Cyanogenmod CM11?
Please check this thread: T999 UVDMD5 Firmware / Bootloader.
According to this, you might have to update some files (bootloader, modem, etc.) to be able to install newer CM versions.
AFAIK, only CM10 is officially suported for your device: [ROM][OFFICIAL] CyanogenMod 10 Nightly Builds for SGH-T999.
If you have further questions, please ask in the T-Mobile Galaxy S III Q&A, Help & Troubleshooting.
Thread closed and thank you.

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Hey Guys need you HELP.
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Hi, thank you for using XDA Assist. First, only flash roms that are specific for your exact device. With your model number changing like it is it appears you've flashed some roms for other devices. You may not be able to recover the device. but see this, http://forum.xda-developers.com/showthread.php?t=1949687

Cannot Boot My I9100

Hey guys. I have a Samsung Galaxy I9100 and without any experience I tries to upgrade my firmware to Lollipop today. It was a disaster. Now I'm stuck in Cyanogenmod 12.1 5.1.1 no installing GApps and no booting, no flashing rom. I cannot install any applications on my phone. I suppose I did something wrong about recovery,but not sure. For this issue, do you guys have anything to suggest? Thanks.
drummertd said:
Hey guys. I have a Samsung Galaxy I9100 and without any experience I tries to upgrade my firmware to Lollipop today. It was a disaster. Now I'm stuck in Cyanogenmod 12.1 5.1.1 no installing GApps and no booting, no flashing rom. I cannot install any applications on my phone. I suppose I did something wrong about recovery,but not sure. For this issue, do you guys have anything to suggest? Thanks.
Click to expand...
Click to collapse
Download the firmware for your phone from sammobile.com and flash using the Odin app for windows using the instructions here.
From this flash custom recovery and try again to update to lollipop using Cyanogenmod files

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