Samsung Galaxy J3 (SM-J3308) Firmware Overview
What is the latest SM-J3308 firmware?
J3308ZMU4CUE2, released June 18, 2021 with Android 9. It is a feature update on bootloader binary 4. The archive holds 21 official builds across 1 region (CSC). Each one is the full stock ROM (flash file) for Odin, not an OTA patch.
Is the Samsung Galaxy J3 still getting updates?
Most likely not: there has been no new firmware since June 2021, so Android 9 is the last version this model got. The final builds below are still the best choice for a clean reinstall.
Which Android versions did it get?
The SM-J3308 builds in the archive run Android 7.1.1 to 9. The earliest build we have for each version:
- Android 9: J3308ZMU3CSH6 (Aug 2019), 13 builds in total
- Android 8.1: J3308ZMU2BRJ1 (Oct 2018), 5 builds in total
- Android 7.1.1: J3308ZMU2ARH1 (Aug 2018), 2 builds in total
Can I downgrade the SM-J3308 firmware?
Only to builds with the same bootloader binary (the Bit column) or higher. In the archive the binary of this model rose from 1 to 4:
- Binary 4 — since Jul 2020
- Binary 3 — since Apr 2019
- Binary 2 — since Aug 2018
- Binary 1 — since Jul 2017
A phone already on binary 4 rejects builds with a lower binary in Odin ("SW REV CHECK FAIL"), so it can go back to an earlier Android version only if that version has a binary 4 build. How to read a build number.
All SM-J3308 firmware builds
| Build / PDA | Bit | Region (CSC) | Android | Date | Download Link |
|---|---|---|---|---|---|
|
J3308ZMU4CUE2
Feature update
|
4 | CHM | 9 |
2021-06-18 | Download |
|
J3308ZMS4CUE1
Security update
|
4 | CHM | 9 |
2021-05-18 | Download |
|
J3308ZMS4CUD1
Security update
|
4 | CHM | 9 |
2021-04-26 | Download |
|
J3308ZMU4CTK1
Feature update
|
4 | CHM | 9 |
2020-12-17 | Download |
|
J3308ZMS4CTG1
Security update
|
4 | CHM | 9 |
2020-08-05 | Download |
|
J3308ZMS4CTG1
Security update
|
4 | CHM | 9 |
2020-07-29 | Download |
|
J3308ZMS3CTC1
Security update
|
3 | CHM | 9 |
2020-04-21 | Download |
|
J3308ZMS3CTC1
Security update
|
3 | CHM | 9 |
2020-03-16 | Download |
|
J3308ZMU3CSK4
Feature update
|
3 | CHM | 9 |
2019-12-09 | Download |
|
J3308ZMU3CSK4
Feature update
|
3 | CHM | 9 |
2019-11-26 | Download |
|
J3308ZMU3CSK2
Feature update
|
3 | CHM | 9 |
2019-11-11 | Download |
|
J3308ZMU3CSH6
Feature update
|
3 | CHM | 9 |
2019-09-10 | Download |
|
J3308ZMU3CSH6
Feature update
|
3 | CHM | 9 |
2019-08-28 | Download |
|
J3308ZMS3BSD1
Security update
|
3 | CHM | 8.1 |
2019-04-25 | Download |
|
J3308ZMS3BSD1
Security update
|
3 | CHM | 8.1 |
2019-04-08 | Download |
|
J3308ZMS2BSA2
Security update
|
2 | CHM | — |
2019-02-23 | Download |
|
J3308ZMS2BSA2
Security update
|
2 | CHM | 8.1 |
2019-02-01 | Download |
|
J3308ZMU2BRJ1
Feature update
|
2 | CHM | 8.1 |
2018-10-11 | Download |
|
J3308ZMU2BRJ1
Feature update
|
2 | CHM | 8.1 |
2018-10-11 | Download |
|
J3308ZMU2ARH1
Feature update
|
2 | CHM | 7.1.1 |
2018-08-13 | Download |
|
J3308ZMU2ARH1
Feature update
|
2 | CHM | 7.1.1 |
2018-08-13 | Download |
Older SM-J3308 Builds (Archive)
6 earlier builds from the samdb.org catalogue. They are not in the download list above; the link searches for the build on the partner site.
How to Flash SM-J3308 Firmware
Put the Samsung Galaxy J3 into Download Mode, load the BL, AP, CP and CSC files into Odin on a Windows PC and press Start. Pick a build with Bit 4 or higher if your phone is already on the latest firmware. Use HOME_CSC to keep your data, CSC for a full wipe.