Tips & Tutorials

Update T-Mobile Galaxy S5 GT900T to Android 6.0.1 Deodexed Marshmallow Custom Firmware

TUTORIAL: How to Install 6.0.1 Deodexed Marshmallow on T-Mobile Galaxy S5 G900T

We have put together a detailed step-by-step instructions guide on how to install 6.0.1 Deodexed Marshmallow custom firmware on T-Mobile Samsung Galaxy S5. If you are used to installing custom ROMs on your Galaxy S5, then this should not be any different for you.

As we mentioned earlier, you need to have a custom recovery installed on your phone. Please do that first and then get back to this tutorial. And before you proceed below, make sure you read the tutorial once before actually performing it on your Android device.

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To Remember:

  • This tutorial is only for installing 6.0.1 Deodexed ROM on T-Mobile Galaxy S5 G900T. Please do not try on any other Galaxy S5 variants.
  • Your phone should have a custom recovery installed in order to install this Deodexed ROM on your phone.
  • We will be using TWRP Recovery for this tutorial.
  • This tutorial will wipe out all your data. Make sure you backup all your data in your phone before proceeding.
  • Perform a Dalvik Cache wipe before proceeding from the Recovery Mode.

Complete Step-By-Step Instructions:

Step 1 – Download 6.0.1 Deodexed ROM for Galaxy S5 to your computer.

Step 2 – Connect and mount your Galaxy S5 USB memory to your computer using the USB cable.

Step 3 – Now copy/paste the downloaded 6.0.1 ROM zip file to your phone memory / SD card. Make sure the file is in the phone memory / SD card root (not in any folder).

Step 4 – Then turn OFF your phone and disconnect from the USB cable.

Step 5 – Now to get in the Recovery Mode. Switch ON the phone while pressing and holding Volume Up + Home + Power buttons together. Alternatively, read this: How to Enter Recovery Mode on Any Android Phone.

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NOTE: Screenshots of the Team Win Recovery Project (TWRP Recovery) may change as new versions are released.

Step 6 – Once you are in TWRP Recovery, perform a full data wipe by tapping on the ‘Wipe’ button. Then swipe on the “Swipe to Factory Reset” option at the bottom.

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Step 7 – Now go back to the main menu and then tap on the ‘Install’ button. From the list, choose the ZIP file that you copied to your phone memory in Step 3.

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Step 8 – Confirm installation on the next screen by swiping on the “Swipe to Confirm Flash” option. The installation procedure should start now as show below.

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Step 9 – Once the installation is completed, you will be shown a similar screen like the following:

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Step 10 – Tap on the “Wipe cache/dalvik” button if you get into any boot loops or other issues.

Step 11 – You can now reboot your phone by selecting the “Reboot System” button.

Your T-Mobile Galaxy S5 will boot now and it might take about 5 minutes to boot on your first time after flashing a new ROM. So, please wait.

That’s it! Your T-Mobile Samsung Galaxy S5 should now have 6.0.1 Deodexed Marshmallow custom ROM installed on your phone! Go to Settings > About phone to verify.

If you run into any problems, feel free to drop us a comment below and we will reply you back ASAP with the fix or the solution to your problem.

About the author

Saad Khan

A geek that has converted into a Software Engineer. An audiophile who love to read and write reviews/tutorials about gadgets and new tech stuff.

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