[Firmware] Unbrick & restore Galaxy Tab 3 7in SM-T210 wifi - Galaxy Tab 3 Q&A, Help & Troubleshooting

Hi,
In my samsung galaxy SM-T210 i have an issue while installing custom rom or official rom after installation i get an error message saying "unable to mount 'efs " error. I did clear all data, catche,system and dalv but also i continue getting same error. After the installation when i power on my device it does not go forward after samsung logo it continues in this window. I waited more than hours but it did not start it keeps on glowing samsung logo. Please help me correct the isssue with every details possible.

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Hi
My note 2 N7100 was keeping to restarting itself yesterday then I did factory reset and everything was okay .. then today it stopped working and hanged in NOTE II logo .. when I enter recovery mood it tells me "failed to mount/ system"
I tried to install the firmware by ODIN but nothing happens
My device not rooted
ANY HELP GUYS ?
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GT N7100 hang at startup

Dear All,
I have Samsung Note 2 Model GT N7100 made in Vietnam.
However, i am staying in Malaysia.
My phone stuck at the start up which the " SAMSUNG NOTE 2: GT N7100" only appreared.
I have no issue to access the download mode or recovery mode.
Tried to flash all the roms and the recovery via odin.
its all success, but still the same screen is appreared.
Always got the below error when perform wipe data/cache
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I am no expert like some of you in the community and I am not novice, I've rooted/installed Roms/ unbricked devices before. I purchased a Samsung Tab 3 T210R that was stuck in the Samsung loop. Upon receiving the Tab 3 I reset to default and wipe cache, it then restated and took me to the set up process if the device (like logging into my Samsung acct, setting up date/time) but it would freeze through the process. So, I then I followed everything stated in this thread http://forum.xda-developers.com/showthread.php?t=2459734 ..after following the steps in the thread I got a "kernel panic" message. I followed the task a second & third time using the first two links in Sammobile (Canada and Cellular South), the device now stays in the Samsung loop and sometimes shows a pixelated/ distorted Samsung logo.
Since I bought the device on eBay "as-is", I don't know what Android version was installed, but from the looks of it, it may have been a stock rom. I do know the model number is T210R 8 GB WiFi. I hope you guys can guide me and explain how to fix this issue. I would truly appreciate your help!
I forgot to mention after rebooting it to wipe cache/reset there's a message in red that reads " E: failed to verify whole-file"
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Can't get pass setup wizard message keep flashing.

Samsung Galaxy tab pro T520
Amateur at routing I tried rooting it then flashed it and I can't get past the setup wizard message that keeps flashing after I rebooted the device and everytime I reboot it Android is dead can someone please help

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