Samsung Galaxy A40

Samsung Exynos 7904released 2019up to android 12latest android is 17

ro.product.devicea40

also sold as Galaxy A40 · SM-A405FM · SM-A405FN · SM-A405S

No recent updates

Released 2019, newest ROM build 4 years ago. Support looks quiet — check the build dates below before relying on it.

Hardware

SoC: Samsung Exynos 7904
CPU: Octa-core (2x 1.8 GHz Cortex-A73 & 6x 1.6 GHz Cortex-A53)
GPU: Mali-G71 MP2
Architecture: arm64
RAM: 4GB
Storage: 64GB
Screen: 2340x1080 · Super AMOLED
Released: 2019

Specs from Nura wiki (formerly postmarketOS) (CC BY-SA 4.0).

ROMs · 02

The Samsung Galaxy A40 (codename a40) has 2 tracked custom ROMs on CustomDroid — including crDroid, Project Sakura, running up to Android 12. Each listing links to the project's own download and install guide, and was last checked against the projects' catalogues on 5 Nov 2026.

Tick “compare” on two or three builds to see them side by side.

Android

crDroidDiscontinuedheavy customisationcompare
android 12v8.2github.com
files and SHA-256 as published
- build file · v8.2 · 710.97 MB · 13 Feb 2022
  crDroidAndroid-12.0-20220213-a40-v8.2.zip
What crDroid published when we last checked. Verify the file you download against the hash on the project's own page; if they differ, don't flash it.
last build 13 Feb 2022 · checked 5 Nov 2026
Install guide Forum Download
direct file from 13 Feb 2022
Project SakuraDiscontinuedcompare
android 11v4.Rby Haridhayalraw.githubusercontent.com
last build 9 Jan 2021 · checked 5 Nov 2026
Install guide Download
direct file from 9 Jan 2021

RSS feed — subscribe to get new Samsung Galaxy A40 builds in your reader · JSON

Before you flash

Flashing generally means unlocking the bootloader, booting a custom recovery, wiping, then installing the ROM. Exact steps differ per device and ROM, so follow the Install guide for the one you pick, and back up first. Check what can break (banking apps, DRM, carrier features) and how to get back to stock before you start. Why flash a custom ROM · All guides

Custom recovery for this device: TWRP. Flash the one your chosen ROM's guide asks for — common recovery errors.

This is a Exynos device, so on Windows you'll want the Samsung Android USB driver before your computer will see it in fastboot. Which USB drivers you need.

Timeline

Jul 2026
Project Sakura first tracked
Oct 2026
crDroid first tracked

Dates show when CustomDroid first indexed each ROM for this device, not when support originally launched.

ROM availability and links come from each project. CustomDroid indexes builds, it doesn't mirror them — always download from the official project, verify the file's hash/signature, confirm it matches your exact codename, and back up before flashing.