: Focuses on mimicking the official Pixel software, often reported to improve device speed over Samsung's stock One UI. GSI (Generic System Images) : Since the A40 is Project Treble compliant , you can flash GSIs for newer Android versions (like Android 14
Custom ROMs provide ~15% better performance and ~20% better battery life than stock. custom rom samsung a40
Transfer your downloaded ROM .zip to an SD card or use ADB Sideload. In TWRP, click Install > Select ROM > Swipe to flash . : Focuses on mimicking the official Pixel software,
However, if you are a tinkerer, a privacy advocate, or simply someone who hates e-waste, a custom ROM transforms the Galaxy A40 from an obsolete relic into a daily driver capable of competing with modern mid-rangers. The Super AMOLED screen still looks gorgeous, and with Android 14 or 15 running on it, the software finally matches the hardware’s potential. In TWRP, click Install > Select ROM > Swipe to flash
8.5/10 Best for: Users who want a Google Pixel phone but only have an A40.
The (codenamed a40 ) was released in 2019 with Android 9 (Pie). While Samsung has ended official OS updates (last being Android 11/OneUI 3.1), the device maintains an active community on XDA Forums . Due to its Exynos 7904 SoC, development is more complex than Qualcomm devices, but several stable, maintained custom ROMs exist, extending the device's life to Android 13 and 14.
