US Cellular Galaxy S5 Lollipop Update v5.0 G900R4VXU1BOC1 Rolling

Samsung is now releasing  the Lollipop update on US Cellular Galaxy S5.  The Lollipop update is dubbed with build number G900R4VXU1BOC1, which is base in Android 5.0  (LRX21T) can be seen via Samsung Kies firmware server. Though, there are no any official announcement from Samsung nor US Cellular  at this time being,  it might start to roll out  via Over-The-Air (OTA) update anytime soon.  It seems that the device technically skipped  the Android 4.4.4  KitKat as the G900R4VXU1BOC1  is already an Android version 5.0 that will  directly upgrade from previous Android version 4.4.2 G900R4VXU1ANK1  that has been released in January.

Since the Galaxy S5 Lollipop update has already rolled out and almost completely covered in USA alone. The update was held available  February on Sprint (Galaxy S5 SM-N900P), Verizon (Galaxy S5 SM-G900V) and T-Mobile (Galaxy S5 SM-N900T). US Cellular is now the 4th US carrier provider that had to released the awaited Lollipop update.    On the other hand,  AT&T (Galaxy S5 SM-N900A) is still in the Android 4.4.4 KitKat but might also available very soon.

Technical Details of Android v5.0 Lollipop / Baseband G900R4VXU1BOC1:


Android version: 5.0 (Lollipop OS)
Baseband version: G900R4VXU1BOC1
Kernel version: 3.4.0-4385544
Build number: LRX21T.G900R4VXU1BOC1
SE for Android status: Enforcing
other info:
AP: G900R4VXU1BOC1
CP: G900R4VXU1BOC1
CSC: G900R4USC 1BOC1
Build date: March 09, 2015
Date released: April 06, 2015

We have just spotted the firmware build version in Samsung Kies firmware repository.  Once available in there you can update right now using Samsung's Kies 3 software update tool.  You may also try to check the update manually via OTA update in your device settings.

How to Update the Galaxy S5 SM-G900R4  to G900R4VXU1BOC1 5.0 Lollipop


Samsung support told users to prepare the following important notes to consider before performing the software update.  I have also added some useful insights why you should follow this procedures to keep your  phone in safe.

Recharge the phone – You should make sure your device is fully recharged before performing the software update. Do not also remove the battery during the software update is in progress. A power failures may cause damaged to your device that might results as we so-called “soft-bricks”. If this happens your device may just stuck on Samsung logo or welcome screen and can’t reboot normally.

Backup important data – Even though it is not as always necessarily but if something might went wrong during the updating process your important data is kept in a safe place.  You should back-up your important files, including contacts, emails, messages, photos, videos, apps and other stuff. Like I said while during software update process is interrupted there is a possibility that your data stored from your device internal SD card may lose or deleted when a sudden unexpected failure happened and it forces you to perform a factory data reset which basically wipes your phone’s memory.

Your Galaxy S5  is not rooted – Your device should not be modified and rooted, there is a certain circumstances that a modified and rooted Galaxy S5 SM-G900R4  may not accept any official software update anymore or it can accept an update but it might harm your device once the update has made. Learn about the new Samsung KNOX security suite. Most known error that says ‘firmware upgrade encountered an issue, please select recovery mode in kies and try again‘ or “Your device has been modified Software update are not available” you should try to avoid that from happening.

Update to G900R4VXU1BOC1 5.0 Lollipop via Over-The-Air (OTA)


This is usually how the carrier branded or locked Samsung Galaxy S5, performs a software update.  This method is Firmware Update through over the air or called as OTA update, which usually a notification message will directly sent to you from your network provider and from  Samsung. It simply notifies you that there is a new software update available to download.  If you did not receive any notification messages you can manually check fro the update instead.  Doing this you may only tap on your Galaxy S5 SM-G900T Settings>>About Device, tap Software Update.
  • Find “Software update”
  • Slide your finger down the display starting from the top edge of your mobile phone.
  • Tap the settings icon.
  • Tap About device.
  • Tap Software update.

It will automatically tells you that a new update is available or your software is up to date when there is none yet. You can simply tap install now when you want to perform an update or install later.

Update to G900R4VXU1BOC1 5.0 Lollipop using Kies 3


The second method is a firmware update through Samsung Kies. You may head-over to Samsung support page http://www.samsung.com/us/kies/  and get it there,  then install it into your Windows or Mac computer. Choose the new Kies 3 which supports the Galaxy S5 SM-G900R4 and other Samsung devices runs with latest version of Android OS.  Once you installed Kies 3, all you need is connect your Samsung Galaxy S5 SM-G900R4   to the computer using the USB cable, then simply run and follow Kies on-screen software update instructions.

For more details about the Lollipop update you may head-over at Samsung support page for US Cellular Galaxy S5 users. -  http://www.samsung.com/us/support/SupportOwnersFAQ