SamFware

This page collects every official stock firmware build available for the Samsung GALAXY A16 5G (SM-A166U) across all regions. The table above currently lists 1 builds spanning Android 16, so you can download the newest release or roll back to a specific version when you need it.

Every file here is an official Samsung stock ROM, not a custom build. Flashing stock firmware is the standard fix for a phone stuck in a bootloop, a failed software update, or a device that will not get past the Samsung logo. It is also the way back to a clean official system if the phone has been rooted or modified.

Use the filters above the table to narrow the list by Android version, bootloader bit, or CSC before you download. The newest build listed across all regions is version A166USQSADZI2 (Android 16), updated October 1, 2026.

You need a Windows PC and the Odin flashing tool. The steps are the same for every build in the table above.

1. Download the firmware ZIP for your exact model (SM-A166U) and extract it. Inside you will find AP, BL, CP, CSC and HOME_CSC files.
2. Back up everything that matters. A full flash erases the phone.
3. Power the phone off, then hold Volume Down + Power to enter Download mode and press Volume Up to continue. Connect the phone to the PC and open Odin.
4. Load the files into the matching Odin slots (AP to AP, BL to BL, CP to CP). For a clean install use the CSC file; HOME_CSC keeps your data but is not recommended when repairing a broken system.
5. Click Start and wait. Do not unplug the phone. It reboots by itself when the flash finishes, and the first boot takes several minutes.

Two rules prevent bricks: never flash firmware made for a different model number, even when the device name looks identical, and never downgrade to a build with a lower bootloader bit than the one already on the phone. Check the BIT/SW REV column in the table before you download.

Is this the official Samsung firmware for the GALAXY A16 5G (SM-A166U)?
Yes. Every build in the table is an official Samsung stock ROM for SM-A166U across all regions. Nothing here is modified or repacked.

Will flashing delete my data?
A full flash with the CSC file wipes the phone completely, so back up photos, messages and anything else you need first. HOME_CSC preserves user data on a healthy system, but for repairs always do the clean flash.

Which CSC should I choose?
CSC is the region and carrier sales code. Pick the build whose CSC matches your country or carrier so that network features and update channels keep working as expected.

Can I downgrade my GALAXY A16 5G to an older version?
Only if the older build has a bootloader bit equal to or higher than the one currently on the phone. Compare the BIT/SW REV column in the table with your current build; a lower bit will fail the flash.

Which build should I download?
In most cases the newest build at the top of the table. Choose an older one only when you need a specific version for testing or repair, and make sure the CSC matches your region.