Samsung Galaxy S23 (SM-S911U1) - TMB - S911U1UEU6AYH9_B2BF firmware
Samsung Galaxy S23 firmware S911U1UEU6AYH9_B2BF is the Android 13 build for the Samsung Galaxy S23 (model SM-S911U1), released by Samsung for USA (T-Mobile) (TMB). It was built on 27 August 2025, carries the 2025-07-01 Android security patch, has changelist 31818883. The package combines system build S911U1UEU6AYH9_B2BF (AP/PDA) with CSC build S911U1TAC6AYH9_B2BF for the TMB region code. SamMobile added this file to the firmware archive on 12 September 2026.
How to flash S911U1UEU6AYH9_B2BF on the Samsung Galaxy S23 (SM-S911U1)
We recommend updating through Samsung's own tools: over-the-air (Settings › Software update) or Samsung Smart Switch on a PC. Flash the full firmware with Odin only when you are sure about the risks. A wrong region or a failed flash can brick the device, and SamMobile is not responsible for any damage.
- Download the firmware package above and extract the ZIP. It contains the AP (PDA), BL, CP and CSC files, plus a HOME_CSC file.
- Download and extract Odin on a Windows PC, and install the Samsung USB drivers if the PC does not detect the phone.
- Switch the device off and boot it into Download mode (usually Volume Up + Volume Down while connecting the USB cable, or Volume Down + Bixby + Power on older models).
- Open Odin. The ID:COM box turns blue when the device is connected.
- Load the files in their slots: BL, AP, CP and CSC. Use HOME_CSC to keep your apps and data, CSC to wipe the device.
- Leave Re-Partition unticked and click Start. The device reboots when Odin shows PASS. The first boot after a flash can take a few minutes.
Step-by-step PDFs: 5-file firmware and 1-file firmware.
What the build numbers mean
PDA / AP (S911U1UEU6AYH9_B2BF) is the Android system build; its last three characters encode the year, month and revision. CSC (S911U1TAC6AYH9_B2BF) is the region and carrier configuration, and CP is the modem firmware. The product code TMB identifies the region or carrier this package was made for (USA (T-Mobile)). Flashing a package for a different product code changes carrier features and can be refused by the bootloader, so pick the one that matches the CSC shown under Settings › About phone › Software information.