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Samsung Galaxy S8+ has got the March 2018 security update G955USQU2CRC5. Here is a very simple Step By Step guide to update the security OTA Update Manually on the Samsung Galaxy S8+ SM-G955U (US Carriers).

Just download the Firmware update using the SamFirm utility or SamMobile website as provided in the below section and then follow the manual OTA update guide to get the latest security firmware update.
 

Before downloading the OTA and update the same manually, you should check if the firmware OTA is available for your device or not.
To check for the OTA Update, Go to Settings -> About Phone -> Software Update -> Check for Update

 

DISCLAIMER:
Manually updating the firmware will WIPE EVERYTHING on your phone. Make sure you do a backup of your phone or backup using Samsung Smart Switch or if you have TWRP installed then you can take a NANDROID backup using the TWRP.
I am not at all responsible if anything happens to your phone as a consequence of following this guide but I can assure you that I will help you as far as possible to get you out of the problem (if something happens).

Galaxy S8+ (SM-G955U) Official Oreo March 2018 Firmware Update Details:

• Supported Device: Galaxy S8+
• Supported Model Numbers: SM-G955U
• Android OS version: 8.0
• Available for US Carriers: Verizon (VZW), Tracfone (TFN), Bluegrass Cellular (LRA), Nextech / C-spire (ACG), CCT (Unknown Carrier)
• Build Number: G955USQU2CRC5
• Update Type: Official Full-OTA
• File Size: 3.6 GB

REQUIRED DOWNLOADS AND LINKS TO UPDATE Samsung Galaxy S8+ (US Carrier) to G955USQU2CRC5:

• Samsung USB drivers
• Samsung Odin Download (for Windows OS)
• How to install Samsung Stock Firmware.
• Download Stock Samsung Firmware Image using SamFirm:
  – Download Stock Samsung Firmware Using SamFirm
  – Use the following data to download in Auto mode:
  Use Model: SM-G955U
  Region: VZW for USA Verizon (Looks like this file is not available)
  Region: TFN for USA Tracfone
  Region: LRA for USA Bluegrass Cellular
  Region: CCT for USA CCT
• Download Stock Samsung Firmware Image From Sam Mobile: [NOT RECOMMENDED BECAUSE FREE DOWNLOAD SPEED IS VERY SLOW AND YOU HAVE TO PAY FOR MEMBERSHIP TO GET HIGH SPEED DOWNLOADS]
  – G955USQU2CRC5 for Verizon SM-G955U (USA, Verizon)
  – G955USQU2CRC5 for Tracfone SM-G955U (USA, Tracfone)
  – G955USQU2CRC5 for Bluegrass Cellular SM-G955U (USA, Bluegrass Cellular)
  – G955USQU2CRC5 for Nextech / C-spire SM-G955U (USA, Nextech / C-spire)
  – G955USQU2CRC5 for CCT SM-G955U (USA, Unknown CCT carrier)

– G955USQU2CRC5 for ATT Direct download link SM-G955U (USA, AT&T)

 

INSTALLING THE Samsung Galaxy S8+ SM-G955U (USA Carriers) March 2018 Security OREO OTA UPDATE:

1. Download and install the Samsung drivers for your phone.
2. Download and install the Samsung ODIN application on your Windows PC before you proceed further.
3. Take backup of your Android phone or using Samsung Smart Switch or if you have TWRP installed then you can take a NANDROID backup using the TWRP.
4. Download the latest March 2018 Oreo OTA update for Galaxy S8+ SM-G955U, using the SamFirm Samsung Stock Firmware download utility using the following guide:
   – Here I have compiled a guide explaining How To Download Stock Samsung Firmware easily and Quickly Using SamFirm.
   – Or you can download the OTA updates from Sam Mobile links I have linked above.
5. After downloading the OTA update install the Samsung stock OTA update using the ODIN application:
   – Here is How to install Samsung stock firmware.

That’s all!!!
Your phone will now be booting into the Latest G955USQU2CRC5 Samsung Galaxy S8+ March 2018 security Update. If you have any concerns while following this update then just login to comment. Till the next update just stay tuned.

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