Please help for Micromax canvas A300.............. - Android Q&A, Help & Troubleshooting

My canvas gold A300 mobile is stuck in a bootloop! I tried to solve it out by flshing a rom but failed.. Now when i was trying to unlock the bootloader to wipe all the user data , it asked for confirmation by pressing volume button.. Bt when i pressed the volume button there was no response on the screen and it does not unlocked the bootloader. Also when i tried to wipe all the data with the recovery it showed me that :
"E:failed to mount '/system'
"E:failed to mount '/data"
"E:failed to mount '/emmc", etc. etc. etc.
Also I am not able to access adb.
Please help me out.

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[Q] i need help plz

i have a china tablet its name is good voice 7" v79
one day when i use( android system recovery e3 ) for do wipe data/factory reset
then i do it but i turned the power off after 1% of the process , now the tab. cant boot
and when i try to do wipe again a message is appeared ( E : failed to mount /system (invalid argument)
and its stuck at the splash screen

Idol 6030x stuck after android logo

Hi!
I have problem with my 6030x, because I loaded it all night and after i woke up telephone was off, then i try to run it and it stuck after android logo (black screen. bootloop?). I have TWRP recovery , but when i try to backup TWRP say "
unable to mount /custpack
unable to mount /emmc During GUI startup
unable to mount /emmc when trying to read settings f" . I tried with flashtool but it shows a message "PMT changed for the rom". I try with all WIPE, from Cache to system and it doesnt works. What i can do?

Help please TWRP error E:Unableto mount '/mnvm2:0

E:Unableto mount '/mnvm2:0
please help me what can i do now ?
Any one help please my phone just booting on recivey and fast boot- i flash system, recovery ,and cust ,and boot but my phone just restarting what can i do ??

Samsung S 3 stuck on recover mode E:failed to mount /efs error how to fix, HELP!!

I need your help
My problem started with lock pattern freezing even it was correct,
I enters the recover mode and wipe the cache I found myself in other problem
E:failed to mount /efs
E: can't mount cache\ data
Now my phone stuck on recovery mode & download mode the startup logo freezing.
More details " stock rom with unrooted device
I don't care about the phone I need to backup my important data,, anyway that can help me guys??
Thanks so much
anyone help me???

MIcromax Canvas A114 - brom no space error (5069)

Hi All,
REquesting for help regarding my Canvas 2.2... It was previously rooted using Farmaroot, and CWM ws also insttalled...everything was working fine, but suddenly the phone was stuck at bootloop all by itself.. I tried to go to the recovery menu, by pressing ( vol+, vol-, pwr) to restore my prev backup, but the recovery menu never came.
Hence i decided to flash the stock rom available here using the SP tool Tutorial.
but when flasing i got the error as brom no space (5069). did a memory test. it showed "NAND NOT DETECTED" and " URS NOT DETECTED"
After that i did lot of googling, stil couldnot find a fix it. tried using multiport tool, but it gave error as incorrect scatter file name, whenevr i tried loading the scatter.
At present the phone is not getting on, it is only getting DETECTED IN SPTOOL
Pleaseeeeeeeee help me out to solve the issue.
Pls pls pls....sme1 pls hlp me out...im at wits end...

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