TWRP custom recovery for the Tab A SM-T280/T285. Latest build is 3.2.1-1
Disclaimer: you flash these at your own risk. Knox counter will be tripped. Having the stock firmware to hand is also advised.
NOTE: BEFORE MAKING MODIFICATIONS, ON SOME ANDROID 5.1.1/6.0 DEVICES IT IS NECESSARY TO GO TO:
Settings -> Developer Options -> OEM unlocking
AND ENABLE OEM UNLOCK FIRST OR YOU MAY ENCOUNTER 'BLOCKED BY FRP LOCK' WHEN FLASHING.
UPDATE 08/01/2018 - TWRP updated to version 3.2.1-1
UPDATE 21/11/2017 - Magisk updated to v14
UPDATE 26/10/2016: GUI lag fix - Lag in the GUI should now be fixed
MTP fix - MTP should now be working
To install TWRP:
1. Flash with ODIN 3.10.7 in the AP slot.
Uncheck Auto reboot.
2. Load the respective file below into the AP slot and hit start.
3. After flashing when ODIN says PASS immediately reboot to recovery by holding POWER + HOME + VOL DOWN.
As soon as the screen goes blank change to VOL UP whilst still holding the other buttons.
You should now see TWRP recovery.
NOTE: at the moment there seems to be a bug which causes the GUI to get a little laggy. If things stop responding just be patient and wait for the GUI to respond. I'm looking into this.
For Systemless Root with SuperSu.
1. Install Supersu via TWRP
This step only required for the SM-T280
2 . Flash the PRE-ROOTED boot image below with ODIN(AP slot) or TWRP(extract boot.img first from tar file). Current version is [SR1-SuperSU-v2.78-SR1-20160915123031].
4. Check you have root
To install Magisk v14:
1. Download Magisk v14 to your device
2. Install the Magisk v14 zip with TWRP
This step only required for the T280
3. Flash the patched boot image below with TWRP.
5. Install Magisk manager
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Boot to download mode from recovery.Hey guys... having issues with my tab. it's a SM-T280 A6... when I boot into download mode it will not let me use the volume up or down to continue. volume up and down work fine every where else... just not in download mode. however it works getting into download mode and I have to use power+volume down+ home to levae download mode.
any ideas what I can do to get around it?
droid version is 5.1.1
Ignore the secure check message.I keep getting a Secure Check Fail: (recovery) on the tablet screen Odin says everything is fine I get a PASS! and sucseed1. The Tablet I have is the SM-280 WiFi Only so I don't know if that matters (not sure why it would) but just got this thing new and would love root so I can speed it up a bit and be able to move any app I want to the SD card. any help would be awesome. Id also like to know if its at all possible (or worth it) to update to at least android 6.0 for a little more stability.
Yeah. I got it figured out about 20 minutes ago. Not sure what was going on but its working now. I had everything enabled and I was following the guide but it wasnt loading the TWRP at first for some reason. I did a factory reset (even though its brand new) took out the sd card and tried again and this time it work. Not sure what changed but not gonna complain lol. Just wish Disney+ would work on rooted devices. The tablets a Christmas present for my daughter and wanted to have that on there for the movies for her. Oh well she'll just need to live with the movies we own on amazon prime.
I don't understand what you guys are doing. I have just checked and it installs fine.I got the same problem too but a hard reset didn't work in my case. Also bought the SM-T280 (runs on 5.1.1) as a gift and am looking to root it so as to cut down on the bloatware and add some Xposed mods. Followed the instructions to a T: OEM unlock and USB debugging enabled, Odin 3.10.7 flashes TWRP with a PASS, BUT "Secure Check Fail: (recovery)" says otherwise. Hmm guessing I'm SOL with the:
I rooted my tab following your method. Later is used link2sd to link apps to second partition(EXT2) of sd card. it worked but after restart apps disappear and i get mount error. Sreenshot is attached. Please help me with this problem or give som other solution to move aal apps to sd card. Btw I believe this root method does not give right root. Link2sd blamed root and i cant use /system /app mover app also(second screenshot).
Secondly, can i install su v 2.82 by this method?
I tried the same with SuperSU 2.82 but even with the DHTB part it gets stuck on boot
I learned that the DHTB part is actually a signature for the following partition. So by just copying another signature I clearly use an invalid one, but it seems the bootloader doesn't care
# Patch image to include additional 512 Bytes Header found on SM-T280 devices if [ "$(dd if=$BOOTIMAGE count=4 bs=1)" = "DHTB" ]; then ui_print "- Found DHTB Header at 0x0000, expecting ANDR at 0x0200" if [ "$(dd if=$BOOTIMAGE count=4 bs=1 skip=512)" = "ANDR" ]; then ui_print "- Found ANDR Header at 0x0200, patching boot.img" dd if=$BOOTIMAGE of=/sutmp/prefix.img count=8 bs=1 dd if=/dev/zero of=/sutmp/prefix-pad.img count=504 bs=1 cat /sutmp/prefix.img /sutmp/prefix-pad.img /sutmp/boot.img > /sutmp/patched.img rm /sutmp/boot.img mv /sutmp/patched.img /sutmp/boot.img else ui_print "- ANDR Header NOT found at 0x0200, boot.img may not work!" fi else ui_print "- DHTB Header at 0x0000 NOT found, skipping step" fi
Hi Jed, after trying various different configs in twrp and even modifying the graphics source code it made no difference.
Magisk updated to v14.I hope the patched boot image for Magisk v14 come soon. I have been preparing my SM-T280 for this. Backing up everything on it, stocking up the stock images for emergency, etc.
(BTW, a noob question, I thought Magisk is doing the patch on boot.img when it is installed. SM-T280 is different?)