M315FXXS4CWK3 – Galaxy M31 firmware
Build M315FXXS4CWK3 is a security update for the Galaxy M31 (SM-M315F)
on Android 12 (One UI 4). It first appeared on Samsung's servers on Nov 27, 2023 (method) and has reached
3 regions so far. It raises the bootloader bit from 3 to 4: once installed, the device no longer accepts firmware with bit 3 or lower, so a downgrade to M315FXXU3CWI1 is blocked. Samsung still serves this file.
- Model
- SM-M315F
- Android
- Android 12
- Type
- Security
- Bootloader bit
- 4
- First released
- Nov 27, 2023
- Regions
- 3
Rollout timeline by region
The date each region code (CSC) first received M315FXXS4CWK3, counted from the first release.
| CSC | Region | Released | Rollout | Version (PDA/CSC/MODEM) |
|---|---|---|---|---|
MXO | Mexico | Nov 27, 2023 | day 0 | M315FXXS4CWK3/M315FOWO4CWK3/M315FDDS4CWK3 |
TPA | Panama | Nov 27, 2023 | day 0 | M315FXXS4CWK3/M315FOWO4CWK3/M315FDDS4CWK3 |
UPO | Uruguay | Nov 27, 2023 | day 0 | M315FXXS4CWK3/M315FOWO4CWK3/M315FDDS4CWK3 |
Download and release notes
samloader download -m SM-M315F -r MXO -v M315FXXS4CWK3/M315FOWO4CWK3/M315FDDS4CWK3Samsung's release notes and security patch level for this update: SM-M315F / MXO on doc.samsungmobile.com. What each part of the build number means: decode M315FXXS4CWK3.