[Q] S3 cannot reboot after install a older version of stock rom? - Galaxy S III Q&A, Help & Troubleshooting

I update my s3 to android 4.1.1 yesterday. Then I saw a leaked rom android 4.1.2 in sammobile today. I installed it and found out that it has a lot of bugs. I tried to install android 4.1.1 back and after install, my phone cannot boot. What should I do?
One more thing, I can stall android 4.1.2 (the leaked rom) and can reboot. But I cannot reboot after I install android 4.1.1 rom.

try a factory reset

Thx. I fix it. :good::good::good::good:

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[Q] Help pls, I installed cyanogenMOD 4.2.2 version of p7510 on my p7500.

I just update my os to a custom rom from the official ics 4.0.4 i never knew i downloaded the 'wifi only' version of the rom instead of downloading the 3g version.
now i am running 4.2.2 but i my version changed to p7510 and i can't find 3g on it.
pls, i need help on procedure to get 4.2.2 on my p7500 because i tried installing 4.2.2 version for p7500 but i'm getting error message.
afelouz said:
I just update my os to a custom rom from the official ics 4.0.4 i never knew i downloaded the 'wifi only' version of the rom instead of downloading the 3g version.
now i am running 4.2.2 but i my version changed to p7510 and i can't find 3g on it.
pls, i need help on procedure to get 4.2.2 on my p7500 because i tried installing 4.2.2 version for p7500 but i'm getting error message.
Click to expand...
Click to collapse
Do a complete wipe (factore reset, dalvik, cache) and install the correct rom version. Also make sure you're running the latest CWM Recovery.

[Q] Problem downgrade from 4.4 to any version

Hello to all, this is my first post and thread, I hope everyone is ok.
Well just yesterday I updated my samsung s3 to a kitkat 4.4, it is a custom version and I do not like it and decided to downgrade it to a 4.1.2, but I have tried several times and I cannot do it
I have used, odin 3.07 and 3.09, lastest version of twrp and cwm recovery and nothing, the twrp log file is attached.
I will appreciate some help, I can only install the 4.4 kitkat but I want to go back to any version, I have 4.1.2, 4.2.2 and 4.3 and none of them work.
up

[Q] Updating from ICS 4.0.4 to Jellybean 4.3

I was wondering If it is safe to flash a 4.3 stock Firmware via odin on my I9300 4.0.4 device.It's baseband version is I9300XXLH1 which hasn't recieved any OTA updates so I'm going to flash one via odin.And I also wanted to know if any fullwipes will be needed after flashing new firmware cause for my I9500 which I flashed a 4.3 firmware on a 4.2 one I needed a fullwipe in order to fully boot the device...

[Q] Updating Rom

Hi
I have managed to root my Samsung Galaxy s2 and install a custom rom, I havn't got a clue what rom it is I think its jelly bean, how can I tell (I think there is a mention some where of jaboo)? Is it possible to update to the latest KitKat version or one that is similar/recommended, without wiping everything off my phone as its such a pain reinstalling all my apps etc?
Cheers

I cannot install any app in my phone

I had android jelly beans installed in my phone and I wanted to try the newest version of android so I updated my phone to android 5.0.1 but I did not like it so I tried to downgrade my phone back to version 4.2.2
I searched the internet for how to downgrade my phone.I found that I have to download the stock ROM for the version that I want to downgrade to.I downloaded the stock ROM for android jelly beans the exact version That was installed in my phone before I updated it.But when I flashed my phone with this ROM, the phone just hang at Samsung logo.So I downloaded the ROM for android kitkat a more updated version. It worked however now I cannot install any app in the phone.When I try to install from the cmd it returns INSTALL_FAILED_DEXOPT .And when I try to install from google play it returns "Tty again ,and if the problem continues ,get help troubleshooting.(Error code:-24)"

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