The Exynos 5420 + LTE modem limits modern ROMs. These are known stable:

The SM-T705 (the LTE variant of the 8.4-inch Tab S) officially stopped receiving major Android updates years ago, likely stuck on Android 6.0 Marshmallow or possibly 7.0 Nougat depending on your region. Running such old software presents security risks and compatibility issues with modern apps like banking services or social media.

It is a rare feeling when a piece of hardware ages like fine wine. The Samsung Galaxy Tab S 8.4, released back in 2014, was a masterpiece of its time. With a dazzling Super AMOLED display (still competitive today), a sleek leather-like back, and an Exynos 5420 octa-core processor, it was the iPad mini killer that never quite got the software love it deserved.

By installing a , specifically LineageOS 18.1 (Android 11), you turn a $50 eBay tablet into a device that rivals modern $150 Amazon Fire HD tablets.

The most common and stable modern choice for this device, maintained unofficially by developers like 8224Freak and HazouPH .

Installing a custom ROM is not as easy as updating via OTA. You need to prepare your device.

7.5/10 Developer: Retired tab (Telegram)

9/10 Based On: LineageOS 18.1

Officially, the SM-T705 was abandoned by Samsung after Android 6.0.1 Marshmallow. If you have one sitting in a drawer, the stock TouchWiz UI feels sluggish, bloated, and insecure.