Update Galaxy Ace S5839i to Android 2.3.6 BUMG1 Official Firmware

In case you’ve been meaning to provide an upgrade for your Galaxy Ace S5839i and didn’t know what firmware to choose, BUMG1 is the perfect pick.

The new stock firmware is only suitable for the Samsung GT-S5839i owned by people over in the UK (Vodafone) and Ireland (Vodafone) who want to have Android 2.3.6 on their phone. This firmware was released in September this year for a device which came out 2 years ago.

If this OS is what you’re after, you should know that the guide will only work on this model, so don’t attempt an update on a different version because the latter shall end up bricked. Since the KIES logo on this firmware is turned on, you
can provide an upgrade via Samsung’s KIES
, too, in which case you will need to have a handset that runs a stock ROM. You won’t need the latter if you use our tutorial, though, but if you choose an upgrade via OTA, you will need that official ROM.

The novelties

Having the BUMG1 installed on your handset means access to these features: CMAS (Commercial Mobile Alert Service), better stability while moving between home screen panels, mobile hotspot bug fixes and better security overall, Vcast apps and an upgrade to VZ Navigator featuring all the latest 3D map enhancements.

The phone comes with better battery life whenever you want to use Phone Book Access Profile Bluetooth headsets, enhanced data throughput performance in environments that register low 4G signals, Visual Voice Mail updates, updated Favorite Contacts widget, the ability to see how much longer you have to wait while you do an OTA update and all-round better stability for data connectivity after you turn Airplane Mode off.

Be prepared for the following: once you update your device, its system partition will be deleted and the root access (in case the phone is rooted) will be revoked. Despite this, you will get to keep your valuable data and the handset’s internal and external SD cards won’t have to suffer damages.Galaxy-Ace-S5839i


And now our usual set of pre-requisites:

  • turn off the security programs on your handset and laptop;
  • the laptop must run Windows;
  • charge the battery of the phone;
  • download and after that install, on your laptop, USB drivers for your Galaxy Ace GT-S5839i;
  • there is an option on your handset known as USB Debugging, so enable it;
  • perform both a regular backup and follow it up with a full NANDroid backup.

Step by step instructions

  1. If the requirements are all in place, you need to start the guide by downloading these files on the laptop and then extracting them after they’re saved there: the Android 2.3.6 Gingerbread BUMG1 (the UK Vodafone version and the Ireland Vodafone version from ) and Odin from this location.
  2. When done with the previous tasks, you need to proceed to this task: enter the handset in a mode called Download Mode; usually, this works in the following manner: press and hold Volume Down, Volume Up and Power, then you should spot the Android logo which will let you know that you’ve completed this task successfully.
  3. So do this afterwards: find the Odin. Then open it on your notebook as Admin.
  4. Next move: connect the smartphone to the laptop via the USB cable of your Galaxy Ace GT-S5839i. If the devices haven’t managed to establish a connection (because there will be no “Added!!” message and no yellow ID:COM box), you should choose another USB port to use or flash, again, the USB drivers on the laptop.
  5. Now perform these instructions to move on: click on PDA, opt for a file with a CODE in its name, tap Phone, choose a file which will have MODEM in the name, click on CSC, opt for that file which has CSC in the name, tap PIT and be sure to select a file that comes with a .pit extension.
  6. What you need to do next is easy: simply check the boxes which have F. Reset Time, Auto Reboot and Re-partition next to them.
  7. [sc name=”banner-jos”]Tap “Start” shortly after you’re done with that and the flashing of the new firmware is going to commence. It will end once the phone reboots and shows you a message reading “Pass”.
  8. Disconnect, when those are displayed, the devices from one another and open the new firmware like this: click on Settings, tap About Phone and then look for the Gingerbread 2.3.6 BUMG1.

After you’ve played with it enough and notice that it’s not as awesome as your phone’s old ROM, the NANDroid backup is going to be of big help. That’s because its role is to restore the device’s previous ROM by revoking the update.

For questions, the comment field below is the one to use!