I have seen many people on the ROM forums saying that you can't install Marshmallow ROMs on a G925I, or asking how to install.
Well I can say that yes it is possible and yes it is really straight forward and easy to do.
So I have decided to do it myself (prior to this I was also on Lollipop ROM) and took down the steps (literally step by step) to help others.
What you need first:
1. Official Stock Marshmallow ROM for G925I
Download from here
2. Odin (I used 3.10.7)
3. Arter97's TWRP 3.0 recovery fro G925FI
Download from here
4. A custom ROM (I used Pure Stock ExtraLite Rom). Copy to your phone.
Steps:
1. Backup (EFS, nandroid, I also copied my files like photos, documents, etc to my PC)
2. Turn off device
3. Power on device directly in recovery (volume up + home + power)
4. Plug USB cable to PC and device
5. Go to Mount and enable MTP
6. Delete folders you don't need (I only kept DCIM, Bluetooth, downloads, documents, etc)
6.1 In DCIM, delete .thumbnails. I also deleted all the other folders with a . in front of them
7. Disable MTP and pull the USB cable from your device
8. Go to Home and click on Wipe
9. Swipe to factory reset
10. Click back and then advanced wipe
11. Select dalvik cache, cache, data and system (no need to wipe internal)
12. Swipe to wipe
13. Turn off device
14. Power on device directly in download mode (volume down + home + power)
15. Press volume up to continue in download mode
16. Start ODIN in administrator
17. Connect USB cable and make sure your device is recognised by ODIN
18. Click on AP and select G925I Marshmallow Stock ROM
19. Click start (it will take some time to flash)
20. Once finished, let it boot into new Marshmallow Stock ROM
21. You can unplug the USB once it is booting
22. Once booted, quickly setup your phone (probably dont need to but i wanted to see it first)
23. Once booted, turn off device completely
24. Power on device directly in download mode (volume down + home + power)
25. Press volume up to continue in downlod mode
26. This time uncheck auto reboot
27. Connect USB cable and make sure your device is recognised by ODIN
28. Click on AP and select Arter97's TWRP 3.0 (.tar.md5)
29. Click start
30. Once finished, unplug the USB cable from device
31. Press volume down + home + power until phone turns off (screen black). Release the keys and immediately press volume up + home + power to boot phone into recovery
32. Agree to TWRP's modification of the system message (swipe to allow)
33. Plug USB cable in device and click on mount
34. Once again delete files you don't need (folders with a . in front of them)
35. Disable MTP and unplug USB cable from device
36. Go to Home and click on Wipe
37. Swipe to factory reset
38. Click back and then advanced wipe
39. Select dalvik cache, cache, data and system (no need to wipe internal)
40. Swipe to wipe
41. Go to Home and select Install
42. Select ROM and swipe to flash
43. Reboot once installation is complete
44. Enjoy!
Credits:
@arter97 for TWRP 3.0
@ambasadii for ROM I used
Well I can say that yes it is possible and yes it is really straight forward and easy to do.
So I have decided to do it myself (prior to this I was also on Lollipop ROM) and took down the steps (literally step by step) to help others.
What you need first:
1. Official Stock Marshmallow ROM for G925I
Download from here
2. Odin (I used 3.10.7)
3. Arter97's TWRP 3.0 recovery fro G925FI
Download from here
4. A custom ROM (I used Pure Stock ExtraLite Rom). Copy to your phone.
Steps:
1. Backup (EFS, nandroid, I also copied my files like photos, documents, etc to my PC)
2. Turn off device
3. Power on device directly in recovery (volume up + home + power)
4. Plug USB cable to PC and device
5. Go to Mount and enable MTP
6. Delete folders you don't need (I only kept DCIM, Bluetooth, downloads, documents, etc)
6.1 In DCIM, delete .thumbnails. I also deleted all the other folders with a . in front of them
7. Disable MTP and pull the USB cable from your device
8. Go to Home and click on Wipe
9. Swipe to factory reset
10. Click back and then advanced wipe
11. Select dalvik cache, cache, data and system (no need to wipe internal)
12. Swipe to wipe
13. Turn off device
14. Power on device directly in download mode (volume down + home + power)
15. Press volume up to continue in download mode
16. Start ODIN in administrator
17. Connect USB cable and make sure your device is recognised by ODIN
18. Click on AP and select G925I Marshmallow Stock ROM
19. Click start (it will take some time to flash)
20. Once finished, let it boot into new Marshmallow Stock ROM
21. You can unplug the USB once it is booting
22. Once booted, quickly setup your phone (probably dont need to but i wanted to see it first)
23. Once booted, turn off device completely
24. Power on device directly in download mode (volume down + home + power)
25. Press volume up to continue in downlod mode
26. This time uncheck auto reboot
27. Connect USB cable and make sure your device is recognised by ODIN
28. Click on AP and select Arter97's TWRP 3.0 (.tar.md5)
29. Click start
30. Once finished, unplug the USB cable from device
31. Press volume down + home + power until phone turns off (screen black). Release the keys and immediately press volume up + home + power to boot phone into recovery
32. Agree to TWRP's modification of the system message (swipe to allow)
33. Plug USB cable in device and click on mount
34. Once again delete files you don't need (folders with a . in front of them)
35. Disable MTP and unplug USB cable from device
36. Go to Home and click on Wipe
37. Swipe to factory reset
38. Click back and then advanced wipe
39. Select dalvik cache, cache, data and system (no need to wipe internal)
40. Swipe to wipe
41. Go to Home and select Install
42. Select ROM and swipe to flash
43. Reboot once installation is complete
44. Enjoy!
Credits:
@arter97 for TWRP 3.0
@ambasadii for ROM I used
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