Unlocking the bootloader and flashing TWRP will perform a factory reset, erasing all your data. Back up your photos, files, and settings before you start.
Click to flash the recovery. Once finished, you will see a green "PASS!" message. Phase 3: Booting into TWRP and Wiping Data
Custom ROMs often strip away Samsung’s heavy TouchWiz/One UI bloatware, freeing up RAM and CPU cycles.
Download and install the official Samsung USB drivers so your Windows PC can recognize the tablet in download mode.
twrp-3.7.0_9-0-gtanotexllte-unofficial-newsources.tar or newer. You can also use version twrp-3.3.1 , which supports Android 6 to 8 and the Exynos 7870 processor. sm-p585y custom rom
: While official support is rare for this model, unofficial LineageOS builds are the go-to for "reviving" the tablet. These ROMs can update the device from its final official Android 8.1 version to much newer Android versions, allowing for better app compatibility. GSI (Generic System Images)
Modifying your device internal software carries inherent risks. Before proceeding, understand the following conditions:
But then, he paused. He remembered the old mantra of the tech forums: Hardware doesn’t die; software kills it.
However, the practical reality of acquiring and installing a custom ROM for the SM-P585Y reveals considerable challenges. Unlike its Wi-Fi-only counterpart (SM-T820), the LTE-enabled SM-P585Y has historically received less attention from the custom development community. This means that finding a stable, fully functional ROM is difficult. While "Generic" System Images (GSIs) based on Project Treble offer a universal solution, they often come with critical bugs on Samsung devices. The most common issues include the complete loss of the S Pen’s advanced features (pressure sensitivity and the Air Command menu), failure of the 4G modem for calls and mobile data, and non-functional hardware like the fingerprint scanner or the rear camera’s flash. For a user who relies on the tablet for note-taking or mobile connectivity, these compromises can render the device less useful than before. Unlocking the bootloader and flashing TWRP will perform
: Unofficial builds exist that aim to provide a stable experience with S-Pen support, though users have reported intermittent installation issues. LineageOS 19.1 & 20 (Android 12/13)
: Get features from modern Android updates.
Tap > Advanced Wipe > Select Dalvik , System , Data , Cache . Tap Format Data > Type "yes" (this removes encryption). Flash the ROM: Tap Install > Select your ROM .zip file from the SD card. Swipe to Confirm Flash.
Click on the button in Odin and select your downloaded TWRP .tar or .img.tar file. Once finished, you will see a green "PASS
Go back to the main Settings menu and open . Toggle USB Debugging to ON.
Following the steps incorrectly can result in a "soft brick" (boot loop) or a "hard brick" (permanent hardware failure). Proceed carefully and at your own risk.
Go to the tab in Odin and uncheck Auto Reboot . This is critical; if the tablet auto-reboots into the stock OS immediately after flashing, it will overwrite TWRP.
While Samsung’s official software was stable, it eventually became "bloated" and outdated. Here is why users switch to custom software:
Open on your tablet and navigate to About Tablet > Software Information .