[Q] Help! (E: failed to mount /efs...) - Galaxy S III Q&A, Help & Troubleshooting

Hello! I have international version of SGSIII and uptil now I thought I had a non-rooted phone (I still think that). This might sound a little noob-ish but since last night my phone has stopped turning on. It loads the samsung logo but thats about as far as it goes. I tried to wipe/factory reset the data through the recovery mode but that did absolutely nothing. Could someone please tell me how to fix this? I had flashed android 4.3 on it quite a few months ago. I am really stuck in a predicament!
Thank you!

Reflash latest firmware with Odin, then factory reset. Follow the guide in general forum, sticky thread.

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[Q]SGSII problem

Hi guys.
I recently purchased Samsung galaxy sII and got it rooted. I'am not sure that if this is the source of the problem but ill describe what i did in hopes that someone will know how to help me...
I installed Litening rom on the first try and used it until decided to try other roms so i got here and grabbed the first one from the list in the Android Development section. Am not sure about the name of the rom but both of them worked as awesome as roms could get.
One day i downloaded Optimize tool box and when I was deleting cache i noticed that market had over 10 mb's of cache [am noob with smartphones] but when compared to the cache that other apps had it was quite a lot.. when i cleared it and clicked home button phone froze... Nothing worked so i decided to pull battery out. After that the phone was stuck at loading animation. After that I cleared all internal cache of the phone, reinstalled rom and it worked. But now am having a weird problem. From time to time phone either shuts down by itself or when remains screen locked for a period of time it remains black [home button does not return me to the lock screen, instead it remains black] and i have to reboot it to get it to work again.
Tnx in advance
Factory reset, reinstall?
AedanD said:
Hi guys.
I recently purchased Samsung galaxy sII and got it rooted. I'am not sure that if this is the source of the problem but ill describe what i did in hopes that someone will know how to help me...
Rooting is not the problem it worked .
Recovery mode and factory reset first option.
Follow that by a wipe and install stock rom and start over if Factory reset not cure problem .
jje
Click to expand...
Click to collapse
Wow you guys are fast.. Will try that, tnx a lot

[Q] Galaxy GT-I9100 Stuck after official FW upgrade - help?

EDIT: Sorry guys, just saw the master thread. Will repost this there. x
Hi guys,
Apologies if there's a thread about this already.
I just upgraded my firmware through the settings menu on my Galaxy S2 - everything seemed to go OK, phone rebooted, now it's stuck on the SAMSUNG GALAXY SII GT-I9100 logo on a black screen indefinitely.
Tried so far:
Removing battery for a period of time, then rebooting
Booting into recovery mode and emptying the cache (have not tried factory reset yet)
Allowed to boot for 30 minutes to see if anything would happen, nothing
Can you guys offer any advice before I consider more extreme measures? I've kind of accepted I'm going to have to format the stupid thing now. Should I do a factory reset before trying to flash the firmware using Odin? I'm about to try this:
http://forum.xda-developers.com/showthread.php?t=1457458
To try to fix what I assume is a soft brick issue. Does this seem like a good idea?
Sorry if I sound like a complete n00b. I don't normally get this involved with my phone, but it's kind of forced my hand this time around
Many thanks x
no worring yet
do factory data reset
if that fails flash a stock rom using odin. search intratech thread in orignal development

[Q] stuck on boot loop after flashing stock

Hello everyone,
I got a little issue, i wanted to go back to stock so i flashed via RSD 2.3.6. 4.5.141 and everything went well (as far as the flashing) then at the end the phone got stuck in a loop at the ATT logo and the program stated "this phone needs to be rebooted manually" so i did yet no luck.
I have tried to do a reset and I can access fastboot, but i can't seems to find a logical solution, i have read several threads but no luck. Any help will be greatly appreciated.
Thank you.
EDIT
Never mind a second factory reset did the trick :S

S6 Edge Brick?! :'(

Hello Guys and Gals ^^
First of all, sorry for my english, i hope everyone can understand my problem
Yesterday my Samsung Galaxy S6 Edge shut down with an batteryload of 90%, after that it just entered a bootloop... :/
Since i've never had a CF or anything like that on my phone, i first thought of an hardware problem.
So i started reading here and some other forums, and tried as recommendet to flash the stock firmware via Odin3.
Now i can go beyond the Samsung - spondered by android or whatever it says - startscreen, the Blue LED starts and i enter the Samsung logo, which blinks for 3-4 times, just to reboot after that again... I also tried other versions of odin and other stock FW for my SM-G925F (Unbranded). Btw, also tried other USB ports, New Cables, Smart Switch... no Kies is running in the back while using odin.
Everytime i used Odin, it seems to work and my phone starts in the recovery mode with the little android guy, saying that its downloading sytem update... ERASING is the last thing he says after 20-30%, and the bootloop starts again. Also wiped cache and did Factory reset, but still no changes
I only used the 1 Part FW for odin. Hopefully that informations are enough for someone to help me out, but if there is a lack of informations, just ask for what you need to know further
I hope someone can help me, since i dont have the money for a new smartphone ^^

Halp... Tab S4 version T830XXU3BSF3 (Wifi) bricked.

So... I followed this guide (https://forum.xda-developers.com/galaxy-tab-s4/how-to/guide-rooting-wifi-version-galaxy-tab-t3841763) and it bricked my Tab S4 version T830XXU3BSF3 (Wifi). I get to the Samsung screen with a custom powered by logo and Set Warranty Bit : Kernal at the top but it wont load any further. I downloaded the latest firmware from sammobile and attempted to flash from Odin. Odin reports all threads completed, but still unable to get past the Samsung screen. Also attempted cache clear and factory reset, nothing worked, can anyone give me some info on how I might be able to resolve this? Or do I just have a fancy paper weight now? Thanks.
(I'm fairly new to this whole process so if I have dump follow up questions, I apologize in advance)
I was able to figure out how to fix it, thanks to anyone that viewed this thread with intents to help.

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