yashsingh1/xdaforums huggingface dataset:
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
[MENTION=649003]jedld[/MENTION] - I'm confused - for the M/N Patches to the kernel, it seems like 2 sets of patches undo each other, namely:

Revert "SELinux: per-command whitelisting of ioctls" - https://android-review.googlesource.com/162275

selinux: extended permissions for ioctls - https://android-review.googlesource.com/162279

and

Revert "security: lsm_audit: add ioctl specific auditing" - https://android-review.googlesource.com/162276

security: add ioctl specific auditing to lsm_audit - https://android-review.googlesource.com/162278

What'd you do for those?
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
I ignored the reverts at first. I can't remember if it worked after that. Though I ended up just doing a straight diff with the selinux modules based on the aosp 3.10.y kernel sources and just merging them.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
Sound good - i'll just diff w/ your repo :) Thx!
[Samsung Galaxy Tab A series Guides, News, & Discus] tdukazudon:
[MENTION=649003]jedld[/MENTION]

This build error happened.Do you have solution?:confused:

hardware/sprd/libmemion/MemoryHeapIon.cpp:614:30: error: variable has incomplete type 'struct ion_kmap_data'

struct ion_kmap_data kmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:614:16: note: forward declaration of 'ion_kmap_data'

struct ion_kmap_data kmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:618:27: error: use of undeclared identifier 'ION_SPRD_CUSTOM_MAP_KERNEL'; did you mean 'ION_SPRD_CUSTOM_MAP'?

custom_data.cmd = ION_SPRD_CUSTOM_MAP_KERNEL;

^~~~~~~~~~~~~~~~~~~~~~~~~~

ION_SPRD_CUSTOM_MAP

/home/aletheia/smt280/out/target/product/gtexswifi/obj/KERNEL_OBJ/usr/include/video/ion_sprd.h:54:2: note: 'ION_SPRD_CUSTOM_MAP' declared here

ION_SPRD_CUSTOM_MAP,

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:638:32: error: variable has incomplete type 'struct ion_kunmap_data'

struct ion_kunmap_data kunmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:638:16: note: forward declaration of 'ion_kunmap_data'

struct ion_kunmap_data kunmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:642:27: error: use of undeclared identifier 'ION_SPRD_CUSTOM_UNMAP_KERNEL'; did you mean 'ION_SPRD_CUSTOM_UNMAP'?

custom_data.cmd = ION_SPRD_CUSTOM_UNMAP_KERNEL;

^~~~~~~~~~~~~~~~~~~~~~~~~~~~

ION_SPRD_CUSTOM_UNMAP

/home/aletheia/smt280/out/target/product/gtexswifi/obj/KERNEL_OBJ/usr/include/video/ion_sprd.h:55:2: note: 'ION_SPRD_CUSTOM_UNMAP' declared here

ION_SPRD_CUSTOM_UNMAP,

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:663:30: error: variable has incomplete type 'struct ion_kmap_data'

struct ion_kmap_data kmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:663:16: note: forward declaration of 'ion_kmap_data'

struct ion_kmap_data kmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:667:27: error: use of undeclared identifier 'ION_SPRD_CUSTOM_MAP_KERNEL'; did you mean 'ION_SPRD_CUSTOM_MAP'?

custom_data.cmd = ION_SPRD_CUSTOM_MAP_KERNEL;

^~~~~~~~~~~~~~~~~~~~~~~~~~

ION_SPRD_CUSTOM_MAP

/home/aletheia/smt280/out/target/product/gtexswifi/obj/KERNEL_OBJ/usr/include/video/ion_sprd.h:54:2: note: 'ION_SPRD_CUSTOM_MAP' declared here

ION_SPRD_CUSTOM_MAP,

^

Import includes file: /home/aletheia/smt280/out/target/product/gtexswifi/obj/SHARED_LIBRARIES/libRSCpuRef_intermediates/import_includes

hardware/sprd/libmemion/MemoryHeapIon.cpp:690:32: error: variable has incomplete type 'struct ion_kunmap_data'

struct ion_kunmap_data kunmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:690:16: note: forward declaration of 'ion_kunmap_data'

struct ion_kunmap_data kunmap_data;

^

hardware/sprd/libmemion/MemoryHeapIon.cpp:694:27: error: use of undeclared identifier 'ION_SPRD_CUSTOM_UNMAP_KERNEL'; did you mean 'ION_SPRD_CUSTOM_UNMAP'?

custom_data.cmd = ION_SPRD_CUSTOM_UNMAP_KERNEL;

^~~~~~~~~~~~~~~~~~~~~~~~~~~~

ION_SPRD_CUSTOM_UNMAP

/home/aletheia/smt280/out/target/product/gtexswifi/obj/KERNEL_OBJ/usr/include/video/ion_sprd.h:55:2: note: 'ION_SPRD_CUSTOM_UNMAP' declared here

ION_SPRD_CUSTOM_UNMAP,

^

8 errors generated.
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
You need so sync up the kernel ion drivers and include files with the one used by the gtexslte
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
Pardon my stupidity, but from your post here with the custom t280 header, how would I go about modifying the degas-mkbootimg command with the permissive kernel that I have?
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
best approach I believe would be to leave mkbootimg as is and just create another commandline utility that takes an exisitng boot.img and prepend the T280 header to it. I'll try to create a C program that does it if I have time.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
I'll clone your repo & add something to repack the t280 boot.img. Sorry - had to read through that post a few times - didn't realize the seandroid header was at the end of the file..

Kernel question : the zImage I compile is ~ 5 megs (Image is ~12) - when i unpack the stock boot.img (or the ones that [MENTION=6847876]_mone[/MENTION] made), they're around ~10 megs. Any ideas?
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
boot.img also contains the ramdisk aside from the compressed kernel image.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
Right, but I'm talking about zImage.. doesn't that remain untouched?
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
If you are comparing to stock size, samsung might have less flags enabled when they built their kernel as compared to the sources available to us so it could be smaller
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
I don't know - I merged most of your def config to mine, and rebuilt stock, _mone, the modified one ive been working on, and your performance_2 branch for the t285 - all the zImages are around 5 MB :

root@ubuntu:/gtaba# ls -la kernel_samsung_gtexslte/arch/arm/boot/*Image*

-rwxr-xr-x 1 root root 12788984 Aug 26 23:06 kernel_samsung_gtexslte/arch/arm/boot/Image

-rwxr-xr-x 1 root root 5622664 Aug 26 23:06 kernel_samsung_gtexslte/arch/arm/boot/zImage

root@ubuntu:/gtaba# ls -la android_kernel_samsung_gtexswifi/arch/arm/boot/*Image*

-rwxr-xr-x 1 root root 12516984 Aug 25 21:05 android_kernel_samsung_gtexswifi/arch/arm/boot/Image

-rwxr-xr-x 1 root root 5488912 Aug 25 21:05 android_kernel_samsung_gtexswifi/arch/arm/boot/zImage
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
For the gtexslte the size is about similar as well:

jedld@jedld-K501UX:~/android-work/kernel/samsung/gtexslte/arch$ ls -la arm/boot/*Image*

-rwxrwxr-x 1 jedld jedld 12672968 Aug 28 07:00 arm/boot/Image

-rwxrwxr-x 1 jedld jedld 5566008 Aug 28 07:00 arm/boot/zImage
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
Alright.. I'll try that.. and just to make sure, you repack zImage not image right? Just curious why when I unpack _mone it's 2x the size
[Samsung Galaxy Tab A series Guides, News, & Discus] zippzYT:
C

Bluetooth headsets, speakers do not work.

No sound comes from them
[Samsung Galaxy Tab A series Guides, News, & Discus] _Slide_:
I happened to stumble across this group via an internet search a day or two ago. -MONE - This is wonderful, thank you so much! I can use this otherwise useless tablet in which I had purchase new at a retail big box store approximately a year ago. I can now reload some important apps which I had removed (due to storage limitations) and were no longer available in the PS due to the 5.X OS.

Has anybody had any success with the built in GPS or Location service working using this updated firmware by chance? I'm unsuccessful. I would like to use this device with offline maps when I'm outside of data coverage areas and I haven't had success having the system recognize location services as of yet. Having the built in GPS which can be used without internet was the reason I had originally purchased the tablet in the first place.
[Samsung Galaxy Tab A series Guides, News, & Discus] tigerpro357:
I was able to get it to work with Google Maps before loading a route, but as soon as I loaded a route it stopped working completely, I chalked it up to the tablet having issues cause it sometimes does that on the factory firmware as well. I, like you, wanted to use this for offline navigation, and factory sorta worked for that, and Lineage was the same, I am currently trying to get a different OS working on it, but its not going very well, it could be my tablet once again as I got it used from a business auction, so these issues could be just my device (which I have assumed so far) or common issues with all of them
[Samsung Galaxy Tab A series Guides, News, & Discus] 2faraway2:
GPS doesn't work on mone's latest build.

Afaik he is working on it ..
[Samsung Galaxy Tab A series Guides, News, & Discus] juanysara:
The post of the rom for the T280 has disappeared @_mone
[Samsung Galaxy Tab A series Guides, News, & Discus] Rutilicus:
The right thread of @_mone is here-->

[RECOVERY][TWRP-3.4.0-3] Samsung Galaxy Tab A 7.0 - SM-T280 (gtexswifi)
[Samsung Galaxy Tab A series Guides, News, & Discus] zippzYT:
I have done all this but still can't get it to work, no zimage appears.

it starts off saying cat: version: No such file or directory
[Samsung Galaxy Tab A series Guides, News, & Discus] Alixbot:
I got my t280 rooted and running lineage android 7.1.2

I can't figure out why my display flips 180 when I press the power to lock it. It's bothersome because I'm trying to use gravity box to have a lock screen blur effect and it's all showing up upsidedown in the background.
[Samsung Galaxy Tab A series Guides, News, & Discus] G_Bot:
Oh i have the same tab and also the same 7.1.2 rom but mine doesn't do that. I would try do a re-flash & factory reset>format data> full wipe before flash.
[Samsung Galaxy Tab A series Guides, News, & Discus] Alixbot:
I did a wipe on twrp before flash and it didnt work. Im back on stock 5.1.1 again and I got root, xposed, deodexed, I tried removing knox apps from the system folders and im not sure i got it all.

My biggest issue is on stock the navbar crashes ui and on 7.1.2 the screen flipped upon lock so gravity box's blurred lockscreen is upsidedown. Its a great tablet, i just wish there was more on it. Once I figure this out I want to make a port of AICP for it or something. I think that would really make us tab 6 users happy.
[Samsung Galaxy Tab A series Guides, News, & Discus] _mone:
Because I've used the Image, w/o many changes it stays around 11mb as the stock one. But the zImage works too.. at least for what I've tested on stock firmware.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
So a little progress - made a program to add the T280 header, but I get stuck in a bootloop - i'll mess around more tomorrow
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
nice! This is for trying to get the stock firmware to boot right?
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
I copied over selinux & got it to compile, but the default config was also heavily modified... I pulled dmesg from recovery, and diff'd it with a good boot. I'll rebuild the kernel tonight with just the selinux changes & the factory config (minus any SAMSUNG flags that were stripped out), and give that a shot.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
duplicate post
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
Booted with selinux changes & fairly stock default config :) Now to figure out what breaks it
[Samsung Galaxy Tab A series Guides, News, & Discus] yackaro:
This sounds like some very promising timing, considering I just bought the nook edition T280. I hope to see updates on the stability and possibly a download soon, I will definitely check it out.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
I think i'm throwing in the towel on this one - I got the stock kernel booting with the selinux changes & a default config that's similar to the t285 (except for kernel profiling/ntfs/f2fs and some other minor things), I just don't have time to keep messing around :(
[Samsung Galaxy Tab A series Guides, News, & Discus] yackaro:
Can you redistribute it for us to test? Even if it's stock kernel, your changes to it are progress regardless.
[Samsung Galaxy Tab A series Guides, News, & Discus] chiefwigms:
Sure - [MENTION=6847876]_mone[/MENTION] [MENTION=649003]jedld[/MENTION] - if you want me to take this down, feel free.

I took [MENTION=6847876]_mone[/MENTION] 's stock AQA4 repo

Along with changes from [MENTION=649003]jedld[/MENTION] 's T285 performance_2 repo (one of the commits after in selinux messed up compiling, so i reverted back to that hash)

And applied the this patch : View attachment T280XXU0AQA4_Permissive.patch

Then I repacked the kernel with [MENTION=6847876]_mone[/MENTION]'s T280XXU0AQA4-SuperSU-v2.82-SPA-boot.img.

New boot image here : View attachment T280XXU0AQA4-SuperSU-v2.82-PERMISSIVE-boot.img

Boots fine on mine.
[Samsung Galaxy Tab A series Guides, News, & Discus] zenful:
Appreciate everyone's hard work in trying to bring some new life into this device, guess I should of bought the 285 instead lol xD
[Samsung Galaxy Tab A series Guides, News, & Discus] yackaro:
I have literally ZERO idea where to start with working on kernels and android porting. If I knew, I'd start changing more flags to see what makes and breaks it, and possibly upgrading to a newer kernel version (4.5.x kernel anyone?)
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
SM-T280 and T285 kernels are 3.10.x based though, it is going to take significant effort to update it to the 4.x.x series. Even simply going to 3.18.x is going to take time. Seems the 3.10.x series will still work with oreo think so that much of a jump isn't going to be too much of a priority.
[Samsung Galaxy Tab A series Guides, News, & Discus] mdigiacomi:
Anyone mind if I take a shot at the T280? I just recently got the device and have experience porting Lineage 14.1 for the Asus Zenfone 3. I would be happy to take a look... looks like [MENTION=649003]jedld[/MENTION] did a lot of the heavy lifting with the T285. A few differences but nothing major.
[Samsung Galaxy Tab A series Guides, News, & Discus] Waancho:
I'd say go ahead!
[Samsung Galaxy Tab A series Guides, News, & Discus] zenful:
Let us know! I'd be happy to test it for ya :)
[Samsung Galaxy Tab A series Guides, News, & Discus] vayavalla:
Hope you do it.

I can also test it [emoji106]

Enviado desde mi SM-T280 mediante Tapatalk
[Samsung Galaxy Tab A series Guides, News, & Discus] zenful:
Hey if you have a GitHub you will be using let us know it as well so we can monitor progress or at least throw us a bone about how it's going every once in a while. Thanks for at least considering this btw (:
[Samsung Galaxy Tab A series Guides, News, & Discus] macapa1994:
im ready to test any rom
[Samsung Galaxy Tab A series Guides, News, & Discus] specter42:
any chance to get ethernet working with an android/kernel update on this device? I have an i-tec USB 2.0 Advance 10/100 Fast Ethernet LAN Network Adapter and it does not get recognized.
[Samsung Galaxy Tab A series Guides, News, & Discus] Thesebax4:
Hello all. I made several attempts today, to boot lineage 14.1

What i did:

- copy zimage from stock to port (lineageos 14.1 for t285)

- copy zimage + ueventd.rc

- copy zimage + ueventd.rc + fstab

None of this works. Tablet stay on boot logo.

Also i try port cm14.1 for sc8830 from this site https://www.romclaims.com/2017/11/s...-rom-for-sc7731-sc8830-kernel-3.10.65-lp.html as always no effect. (rom installed succesfully after make few changes in updater script, I port boot.img from their tutorial)

What can i try next? Im sure porting from t285 to t280 is much better than porting from sites with sc8830 roms.

EDIT:

Stock T285 rom works perfect on T280 with T280 kernel (like ashyx say in other post). I think major problem is in lineageos kernel, thats why rom won't boot on T280
[Samsung Galaxy Tab A series Guides, News, & Discus] dcap0187:
i hope one day soon someone will get this, thanks to all who have put in an effort
[Samsung Galaxy Tab A series Guides, News, & Discus] o0o.paw:
Is there any chance someone could point me in the right direction to find the t280 Kernel? What t280 Roms are available that people are using? Oh and one more thing is there a tutorial that anyone has used to create their own Touchwiz rom? I want to create my own Note Edge rom and once I've done that I want to create one for the t280 (I want a couple of heavily debloated roms with some of the deleted options removed from the touchwiz settings menu)
[Samsung Galaxy Tab A series Guides, News, & Discus] Thesebax4:
[MENTION=4411877]o0o.paw[/MENTION] You can find stock kernel in samsung firmwares in sammobile etc

We need here a serious developer, who can write kernel and system from source. I tried port many roms (t285, roms for sc8830 socket) but without success. Maybe this is zImage fault maybe init/init.rc. Many files (example ueventd.rc) are the same on both roms.

BTW If anyone want to modify boot.img don't forget about DHTB signature, without this tablet won't work. This is the sigtype in split_img file if you using Android Image Kitchen
[Samsung Galaxy Tab A series Guides, News, & Discus] barrie.kenyon:
Hi

Let me add my vote. I have a stock T280N and would very much like to move it forwards to Lineage 14.1. I am not a developer but have loaded Cyanogenmod onto phones previously.

I will keep watching development.

Good luck.
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
Stock T280 kernel will not work with lineageos 13 and 14.1 since it needs updated patches. You have to compile kernel from source and apply patches for Android M and N. Are you able to get a logcat, though with kernel boot errors you might not even get to the logs.
[Samsung Galaxy Tab A series Guides, News, & Discus] tdukazudon:
Rightly Stock T280 kernel to boot is T-280 SPA kernel based?

And Is there any hope of boot rightly with your T285 kernel M / N patches?
[Samsung Galaxy Tab A series Guides, News, & Discus] heyoooo142:
Is there anyone currently making progress ?
[Samsung Galaxy Tab A series Guides, News, & Discus] larylbe146:
Sm-t280 marshmallow atleast

Come on guys can someone PLEASE complete a rom for my poor little SM-T280.
[Samsung Galaxy Tab A series Guides, News, & Discus] jimjam503:
So is it possible to get marshmallow for the t280 yet? Ive used ashyx instructions to root and install twrp recovery and that worked great.
[Samsung Galaxy Tab A series Guides, News, & Discus] FabioSan:
Around one year ago I tried with another good dev to make a custom kernel working on a rom for T280. We correctly went to a positive state where the custom kernel with the needed commits was working, but nothing on the custom rom ( I tried to port Lineage 14.1 basing mostly on t285 sources adapting to 280 as well as I could, fixing a lot of build errors.

The problem is that the tablet isn't saw by pc to get a logcat, also forcing it with some strings on source files.

https://github.com/Fabio-San/kernel_gtexswifi

This is my github related, I have also device tree and other repos. Feel free to check them :)
[Samsung Galaxy Tab A series Guides, News, & Discus] tiny4579:
Anyone run into this when trying to build the kernel?

I updated ion drivers fro the LTE kernel as recommended in the thread.

vendor/sprd/open-source/libs/vpu/vpuapi/../vdi/vdi.c:301:49: error: incompatible pointer to integer conversion assigning to 'unsigned long' from 'void *' [-Werror,-Wint-conversion]
vdi->vpu_instance_pool_memory.virt_addr = NULL;
^ ~~~~
vendor/sprd/open-source/libs/vpu/vpuapi/../vdi/vdi.c:380:54: warning: incompatible pointer types passing 'vpudrv_buffer_t *' (aka 'struct vpudrv_buffer_t *') to parameter of type 'vpu_buffer_t *' (aka 'struct vpu_buffer_t *') [-Wincompatible-pointer-types]
if (alloc_mem_from_mmu(&vdi->pvip->vpu_mem_pool, &vdb))
^~~~
./vendor/sprd/open-source/libs/vpu/vdi/vdi.h:171:64: note: passing argument to parameter 'vdb' here
int alloc_mem_from_mmu(vpu_pool_t* vpu_mem_pool, vpu_buffer_t* vdb);
^
vendor/sprd/open-source/libs/vpu/vpuapi/../vdi/vdi.c:447:21: error: incompatible integer to pointer conversion passing 'unsigned long' to parameter of type 'void *' [-Werror,-Wint-conversion]
osal_memset(vdb.virt_addr, 0x00, vdb.size);
^~~~~~~~~~~~~

I'm using the repo from [MENTION=649003]jedld[/MENTION] and have the following manifest:

<manifest>
<project path="vendor/lge" name="TheMuppets/proprietary_vendor_lge" remote="github" />
<!--<remove-project path="bootable/recovery" name="LineageOS/android_bootable_recovery" />
<project path="bootable/recovery" name="omnirom/android_bootable_recovery" remote="github" revision="android-8.1" />
<project path="external/busybox" name="omnirom/android_external_busybox" remote="github" revision="android-8.1" />-->
<project path="device/samsung/gtexswifi" name="Fabio-San/device_samsung_gtexswifi" remote="github" revision="n7.1" />
<project path="kernel/samsung/gtexswifi" name="Fabio-San/kernel_gtexswifi" revision="stock" />
<project path="vendor/samsung/gtexswifi" name="Fabio-San/vendor_samsung_gtexswifi" remote="github" revision="n7.1" />
<project path="vendor/sprd" name="jedld/android_vendor_sprd" revision="lineageos-14.1" />
<remove-project path="device/samsung/gtexslte" name="jedld/device_samsung_gtexslte" remote="github" revision="cm-14.1"/>
<remove-project path="vendor/samsung/gtexslte" name="jedld/vendor_samsung_gtexslte" remote="github" revision="cm-14.1"/>
</manifest>
[Samsung Galaxy Tab A series Guides, News, & Discus] joeyxl:
ah i wish i knew how to do this stuff, i have a t280 as well and i want google off, and use it as a offline GPS for foraging and fishing.
[Samsung Galaxy Tab A series Guides, News, & Discus] mrhubris:
lol, i just both two T280's for the kids. Wanted to make them a bit "safer" by rooting and flashing a custom ROM. Shame.
[Samsung Galaxy Tab A series Guides, News, & Discus] jedld:
You can actually do without that vpu library, try removing the vpu folder
[Samsung Galaxy Tab A series Guides, News, & Discus] Lazy8:
Has this died? I desperately want a decent ROM for my T280 as well. If this is dead maybe I'll pickup where you left off.
[Samsung Galaxy Tab A series Guides, News, & Discus] RushBlue:
Just saw this thread now, was there any more life in this - did anyone get a working rom to update the SM-T280?
[Samsung Galaxy Tab A series Guides, News, & Discus] Pondy:
Anything happening here? I just bought one of these to mount in my car (was the only tablet I found that was the right dimensions).
[Samsung Galaxy Tab A series Guides, News, & Discus] Daniel5161:
New firmware update (here in Germany (dbt))
[Samsung Galaxy Tab A series Guides, News, & Discus] vayavalla:
What?
[Samsung Galaxy Tab A series Guides, News, & Discus] Daniel5161:
Look:https://www.sammobile.com/firmwares/galaxy-tab-a-/SM-T280/
[Samsung Galaxy Tab A series Guides, News, & Discus] Fulano_LeTal:
some performance improvement?

Have you noticed any improvement in the tablet with this firmware update???
[Samsung Galaxy Tab A series Guides, News, & Discus] Daniel5161:
Sry but i didn't noticed anything. The update description says " Improving device security" but no new security patch level, no new Android version, no new features or settings and the stability and performance seens the same. I only noticed that the battery life has improved. (Maybe I'm just imagining that but before i updated i have get up to 7:30 hours SOT (watching YouTube with 30% brightness and nothing more active) and after the update i got up to 8:30 SOT.
[Samsung Galaxy Tab A series Guides, News, & Discus] mr_ppp:
Such a shame this tab never got an update - I got one free with my partners S9 recently, guess I know why they were giving them away! Slow and outdated, only thing it does well for me is Netflix
[Samsung Galaxy Tab A series Guides, News, & Discus] FabioSan:
Welcome aboard, captain xD