failed to mount / efs etc. - Sprint Galaxy Note 4 Q&A, Help & Troubleshooting

started getting this error not for sure what i did i have a backup before it started but it doesnt fix the issue either, but ive tried flashing ok1,pd1 stock tar passes but when it goes to boot goes straight to stock recover with error at bottom of screen. it boots fine everything seems to work it justs laggy when doing stuff on the phone like texting it freezes up for sec ever few words tried updating it downloads goes to install says failed reboots back up any solution im on 6.01 and the sprint id pops up with download error everytime i restart phone thanks for any help

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Stuck in bootloop even after flashing RUU...

Hey everyone, sorry if this has been asked before but at the moment my phone is completely stuck and I'm on the edge of sending it into HTC, just wanted to know if there's anything I've missed
For the past few weeks I've been running ARHD 30.0 perfectly fine until Saturday. I suddenly got lots of pop up errors like "the process com.android.media has stopped" and other similar errors for other apps. The phone would then crash and reboot, getting stuck at the "HTC One X" splash screen. I had Clockworkmod recovery and tried a nandroid backup and everything was fine for a bit but then the errors happened again and then bootloop. Same happened when I reflashed the boot.img and the ROM: fine for a day or so, then errors then bootloop.
I finally resorted to flashing the RUU. The process went fine and then suddenly the same thing started to happen: pop up errors and then stuck in bootloop. I'm able to get into fastboot but I don't know if it can be a software problem if it's doing the same thing even after flashing the RUU. Part of me is thinking it's a hardware issue: I remember some error warnings when I had clockworkmod recovery saying "E: is a read only system" or something similar, so I wonder if I need to send it in.
I'll be back in in a couple of hours and can get it and get more information, but off the top of my head S-ON was on before and after the situation. Thanks in advance.

[Q] need help galaxy tab 3 t210r

ok, so my tab keeps restarting. heres what is going on
it started popping up this error of systemui has stopped followed by a few others cant remember off the top of my head.
thats not the real issue though, the problem is every time i tap "ok" my tab restarts itself.
i have wiped everything and restored with kies, i have have wiped everything and installed every rom i could find on the net and nothing works. it just constantly restarts and sometimes it just stays on the boot logo untill the battery dies or i power it down. i can flash twrp and flash any rom to it with no problem download mode works fine i have flashed roms with kies, odin, and through recovery, nothing gets it going. please any help would very appreciated

Phone possibly bricked. Can't get into download mode. HELP

Hey im using a d855. Recently i was on on CM 13 and my phone got in a bootloop. I then tried to flash different roms from TWRP, tried to clear dalvik and cache but failed. Because every time i tried doing that TWRP was unable to mount cache/system etc and couldnt wipe anything. Then I decided to go back to stock. I used the TOT method. While the installation was going on in the LG flash tool it got stuck about 30-40 percent and a fail message popped up. It was because my phone randomly just shut off in the middle of the installation. So, i tried to do it all over again, but this time i cant even get into the download mode. When i hold down the volume up button and plug in the USB the phone goes directly to the LG screen and then goes into the "Firmware Update" screen. I tried to install the stock rom in this state, but this tie the installer stops at 5 percent and an error saying "cant get into download mode" pops up.
Now, theres no twrp, when i try to get into recovery it goes straight back to the firmware update screen. Turning the phone on normally also has the same result. I am using a USB 2.0 .
What should I do? Is there any way to save this thing? Or should I call it quits and declare it dead?
TIA
use LG mobile support tool - put into download mode, now DON'T click start upgrade - Rather goto options then click update recovery - this will write slowly the complete firmware back to phone to fix corrupted files etc - will take 57+ mins and may seem stuck from 0% to 22%, it's not just wait it out . 1 hour + to fix.

Unable to do a full wipe or flash anything

Hello.in my galaxy nexus i cant do anything
it reboots after 20 seconds alive.
it says com.android.phone stopped
it says messenger is stopped
it says android.process.acore stopped
it says dialer stopped
and reboots. i cant format it,when i press erase everything,nothing happen,just reboots
tried factory reset from stock recovery nothing
tried flash another recovery but its still stock revoery
i tried this topic
it seems to succeed but no,same result,all my data are still here.
Anything else ?
thanks for help
https://goo.gl/photos/ekMcFf2ZcJCtfEin9
see video please

Tablet stuck in cyanogen loop, cant reflash, cant format - help!

I've had a problem with this tablet for the last 2 years and i keep giving up trying to fix it.
I have custom recovery and a version of installed on it. When it boots cyanogen works for about 5 seconds and then it crashes. When i reboot the device the same thing happens. When i try "Turn off" the device it refuses to turn off and the loop continues.
When i enter custom recovery and try wipe the device it tells me its wiped and when i restart the device it hasn't wiped and reverts back to cyanogen.
When i use Odin with the correct MD5 file and load it into PDF odin successfully flashes it to the tablet. Then when the tablet starts up it starts back into cyanogen.
I cant get back to stock and i cant remove cyanogen. Please help! its driving me nuts!
Galaxy Tab 3 - SM-T210 (not the SM-T210-R)

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