Device stuck on boot logo - Galaxy S3 Neo Q&A, Help & Troubleshooting

So the little idiot of me tried changing the build.prop file which is only editable with root. My device is ofcourse, rooted. So after editing only the model number and restarting the phone, it's stuck on device name logo. Anyone know how to revert this? How can I fix this if I can't even boot into the phone.

Just flash the stock ROM via Odin.
Stock ROM at SamMobile and Odin at this post

I just did that. At first I was afraid of losing all my data on sdcard, but after reflashing the stock rom all my data was intact, including my apps. Thanks for the help!

Your data was intact because you didn't make wipe

Related

[SOLVED] Phone booting only to recovery after kernel update

Hey,
I had G3mod kernel on almost stock JPU. I wanted to try the Astrum Kernel so I flashed it. Although now my phone only seems to boot to recovery. Once it reboots it automatically goes to recovery. I tried wiping cache and dalvik. Also tried flashing the G3mod kernel again, doesn't work. Anything I could do without flashing the whole rom again? Please help.
did you try a factory reset?
Why dont you flash again?
Sent via Tapatalk from my awesome Galaxy 3
Thank you for replies. To anybody having the same problem. If you want to preserve your phone data (messages, contacts, log calls etc.) you have to flash the firmware again (in my case it was default JPU) without the 'data.rfs' file in the tar package. It will let you boot up the phone without losing your data and you will be able to backup them.

Fix freeze , lags etc.

Hello people my phone getting old i think 1.5 year so far my phone started to freeze having lags getting too hot while browsing. And bootloops started without flashing anything. First bootloop happened 2 weeks ago. Today happened again twice i wiped dalvik cache and everything is fine how can i fix it? I thought rom cause it i flashed stock firmware rooted it and removed bloatware. Still happens lags,freeze,getting too hot and bootloop. Is it lollipop update? I never had this issues with kitkat. How can fix this and keep my alive?
Orangley said:
Hello people my phone getting old i think 1.5 year so far my phone started to freeze having lags getting too hot while browsing. And bootloops started without flashing anything. First bootloop happened 2 weeks ago. Today happened again twice i wiped dalvik cache and everything is fine how can i fix it? I thought rom cause it i flashed stock firmware rooted it and removed bloatware. Still happens lags,freeze,getting too hot and bootloop. Is it lollipop update? I never had this issues with kitkat. How can fix this and keep my alive?
Click to expand...
Click to collapse
Try a full factory reset. Be careful as this will wipe your internal storage.
GDReaper said:
Try a full factory reset. Be careful as this will wipe your internal storage.
Click to expand...
Click to collapse
Thank you for your answer but I did it after flash stock rom via odin. Wiped data / factory reset , cache partition , mounted cache , system , data , wiped dalvik cache..
Wiping data does not equal a factory reset. Wiping data does just that, wipes user installed apps. But generally leaves the internal storage alone.
A factory reset returns the phone to the settings it came out of the factory with, including a clean internal storage(If you have the stock rom). I heard that changing roms and just wiping data, dalvik and cache will still leave behind some files.
But it could also be untrue.
GDReaper said:
Wiping data does not equal a factory reset. Wiping data does just that, wipes user installed apps. But generally leaves the internal storage alone.
A factory reset returns the phone to the settings it came out of the factory with, including a clean internal storage(If you have the stock rom). I heard that changing roms and just wiping data, dalvik and cache will still leave behind some files.
But it could also be untrue.
Click to expand...
Click to collapse
Flashing stock rom is same with factory reset i think clears everything.
I don't know. Haven't flashed stock on this device yet.
But don't most guys recommend doing a wipe before going back to stock?
I dont know i'll try that when i have free time. I did research some guys saying lollipop causing these problems. I'll try wipe before flash stock rom again , if issues keep happen i'll use lates 4.4.2 custom rom. Thank you for your answers i'll report back.
Real reset
This method will wipe everything, including operating system and efs files. Before you do this:
you must root
Download twrp recovery
Install the recovery using the app from the play store
Boot into recovery mode and have twrp backup everything
save your backup to an SD card and the computer (can't hurt to have two backups)
Doing the above will preserve your phone important data like your imei and efs
in case something goes wrong.
NOW
after you have backed everything up use twrp recovery to wipe data. Have twrp wipe everything except for your SD card (don't won't to lose the backup)
After everything has been obliterated have twrp boot you into download mode.
Download Odin from XDA preferably 3.09 (most stable release) and then grab an official stock firmware from a trusted source. The latest stock firmware should be at least 4.4.2
If you have carriers other than t-mobile you will also need to find a PIT file for partitioning.
When you have all of this open up Odin with your phone connected in download mode and make sure repartitioning, clear efs and nand-erase is checked along with the defaults.
Select pda button and choose your firmware (unzipped tar.md5 format.) Then select repartitioning PIT file button and direct to where you have the PIT file downloaded.
now click start (be sure that the Com port is recognized by Odin: will be highlighted in blue or yellow.)
This will take a while depending on your computer.
when it finishes your phone should reboot with a fresh os and filesystem. If you get stuck in a bootloop reboot into recovery mode and do a wipe data and wipe cache. Reboot and your phone should be good as new.
IMPORTANT!!! It is vital you keep your TWRP backups for as long as you have your phone if you lose them and something goes wrong while flashing your phone you will lose important things such as IMEI baseband which will prevent you from connecting to your network and Sim card recognition.
Thank you so much i'll try this now.
AndroidInitiate said:
This method will wipe everything, including operating system and efs files. Before you do this:
you must root
Download twrp recovery
Install the recovery using the app from the play store
Boot into recovery mode and have twrp backup everything
save your backup to an SD card and the computer (can't hurt to have two backups)
Doing the above will preserve your phone important data like your imei and efs
in case something goes wrong.
NOW
after you have backed everything up use twrp recovery to wipe data. Have twrp wipe everything except for your SD card (don't won't to lose the backup)
After everything has been obliterated have twrp boot you into download mode.
Download Odin from XDA preferably 3.09 (most stable release) and then grab an official stock firmware from a trusted source. The latest stock firmware should be at least 4.4.2
If you have carriers other than t-mobile you will also need to find a PIT file for partitioning.
When you have all of this open up Odin with your phone connected in download mode and make sure repartitioning, clear efs and nand-erase is checked along with the defaults.
Select pda button and choose your firmware (unzipped tar.md5 format.) Then select repartitioning PIT file button and direct to where you have it downloaded.
now click start (be sure that the Com port is recognized by Odin: will be highlighted in blue or yellow.)
This will take a while depending on your computer.
when it finishes your phone should reboot with a fresh os and filesystem. If you get stuck in a bootloop reboot into recovery mode and do a wipe data and wipe cache. Reboot and your phone should be good as new.
IMPORTANT!!! It is vital you keep your TWRP backups for as long as you have your phone if you lose them and something goes wrong while flashing your phone you will lose important things such as IMEI baseband which will prevent you from connecting to your network and Sim card recognition.
Click to expand...
Click to collapse
Odin freeze everytime i put twrp tar.md5 file cant i use philz touch which i use for long time?
Orangley said:
Odin freeze everytime i put twrp tar.md5 file cant i use philz touch which i use for long time?
Click to expand...
Click to collapse
Is that another custom recovery?
If so then yes just make sure you have all of your system files and most importantly your efs backed up.
Run odin as administrator if that doesnt work, try using another version of Odin.
AndroidInitiate said:
Is that another custom recovery?
If so then yes just make sure you have all of your system files and most importantly your efs backed up.
Run odin as administrator if that doesnt work, try using another version of Odin.
Click to expand...
Click to collapse
Doesnt work another versions both twrp and odin. I'll keep my custom recovery and try it.
Orangley said:
Doesnt work another versions both twrp and odin. I'll keep my custom recovery and try it.
Click to expand...
Click to collapse
What carrier are you using, model number of the phone, etc.
Have you backed everything up? And can you flash the custom recovery through Odin if it fails?
Try it without wiping efs first just to be safe
Look here for your device you will be able to find standalone flash able versions of twrp that should work through odin.
http://twrp.me/Devices/
Using i9500. And i did what you said and works fine thank you! Mods close thread please.

[Q] S4 9505 stuck in Bootloop - Even after installing new firmware

I have a Samsung S4 9505 mobile which is stuck in a bootloop.
In order to fix it I have installed a new firmware (Android 5 and 4.4) via ODIN but that does not change the boot loop.
USB debugging is not active on the device. I have wiped the cache several times. I do not want to make a factory reset because there is still some important data on it.
Is there a way to fix this or to rescue the data?
Thanks
Dusi
If the data is in the internal storage, install TWRP and use its file manager and try to recover it that way. It's odd that reinstalling the ROM via Odin didn't help, but regardless of that, a factory reset is likely in your future. If the data cannot be retrieved using the TWRP file manager, it's lost.

Stuck in boot loop, how can I save my app data?

OK, I played with Titanium Backup and removed some Samsung apps like S health... Now I am stuck at boot loop and phone wont start. I am on stock rom 6.01 rooted. tried everything I could read:
- installed TWRP - did not quite work, gave me an error "is not seadroid"
- installed CWM - I can boot into it, but not much I can do to fix the boot, I tried wiping the partition cache and dalvik, but not help
- installed root again with stock recovery, nothing..
If I install the latest version of stock firmware, will I loose my app data? All I care about is to preserve my notes from ColorNote I read somewher that if a rom does not have userdata img, it wont wipe. Does the stock firmware have that? I am just looking for a way to get back in, backup stuff, and then reflash properly.
I tried going the adb route, but nothing there either. In cmd it says now unlock your phone for the pull command to compete, which obviously I cannot do.
Any other options to save my ColorNotes and Pictures?
OK, I was able to execute:
adb pull / C:\Myfile
This copied system files pretty much. How do I copy the app data or personal data - that's what I actually need
Got lucky...
I had to flash the latest stock firmware, but because I was running it anyway, just not the latest security patch, I the system ended up upgrading and all my files were preserved. It is as if I simply got the monthly patch.

Bootloop -- completely stock

I have a Canadian s7 edge and it's completely stock (no root, no TWRP). It gets to the Samsung logo and doesn't go further.
G935W8 (hero2ltebmc) firmware G935W8VLU2BQH1
Doesn't seem to boot into safety mode. I can access stock recovery and download mode.
Is there a way I can access internal storage to save data before I wipe? I looked into flashing TWRP, but with the encryption on the phone, it looks like I'll need to wipe when flashing dm-verity.
Flash Stock Rom. With Odin, Then Perform A Full Wipe In Stock Recovery,Then Reboot
zzThrain said:
Flash Stock Rom. With Odin, Then Perform A Full Wipe In Stock Recovery,Then Reboot
Click to expand...
Click to collapse
Wouldn't flashing stock ROM wipe the storage? I'm looking to save internal data (photos/videos/etc) first before doing anything else.
BMAN24 said:
Wouldn't flashing stock ROM wipe the storage? I'm looking to save internal data (photos/videos/etc) first before doing anything else.
Click to expand...
Click to collapse
Indeed it will, but if you can connect your phonw to computer ypu could transfer your stuff over, but like you said its in a bootloop so most likwly it wouldnt read onto the computer.
Latest fw is causing overheating, bootloops, fast battery drain, stuck black screen with pulsing blue notification lights and buttons unresponsive. Just Google it.
Is there anyway to downgrade stock rom without tripping know.

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