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Is there an extensive / complete user guide on how to UN install Sailfish OS and revert back to Android?

I have tried the following but failed in many different ways:

1. EMMA: It fails ? to correctly identify my XA2 Ultra (1312-4773), so doesn't do anything: Because of Unlocked bootloader?

1. FlashTool (Sony Mobile Flasher by Androxyde) latest version): It does not provide me with the correct ROMs,

or does not see the downloaded ones after creating FTFs

1. FlashTool ( older versions) Allthoug this shows the downloaded and created FTF files, all of them do not flash because of a lot of INCORRECT version within the downloaded files?

Anyone walked these roads before or have a simple method of reverting to Android on XA2 Ultra?

e.g. Is it possible to go back to the stock rom of my Sony XA2 Ultra, that does not refer to this only article that I allready found and does not work for me ( see point 1) https://jolla.zendesk.com/hc/en-us/articles/115004283713-Reverting-Xperia-to-Android-OS-and-reinstalling-Sailfish-OS

Is there an extensive / complete user guide on how to UN install Sailfish OS and revert back to Android?

I have tried the following but failed in many different ways:

1. EMMA: It fails ? to correctly identify my XA2 Ultra (1312-4773), so doesn't do anything: Because of Unlocked bootloader?

1. FlashTool (Sony Mobile Flasher by Androxyde) latest version): It does not provide me with the correct ROMs,

or does not see the downloaded ones after creating FTFs

1. FlashTool ( older versions) Allthoug this shows the downloaded and created FTF files, all of them do not flash because of a lot of INCORRECT version within the downloaded files?

Anyone walked these roads before or have a simple method of reverting to Android on XA2 Ultra?

e.g. Is it possible to go back to the stock rom of my Sony XA2 Ultra, that does not refer to this only article that I allready found and does not work for me ( see point 1) https://jolla.zendesk.com/hc/en-us/articles/115004283713-Reverting-Xperia-to-Android-OS-and-reinstalling-Sailfish-OS

Is there an extensive / complete user guide on how to UN install Sailfish OS and revert back to Android?

I have tried the following but failed in many different ways:

1. EMMA: It fails ? to correctly identify my XA2 Ultra (1312-4773), so doesn't do anything: Because of Unlocked bootloader?

1. FlashTool (Sony Mobile Flasher by Androxyde) latest version): It does not provide me with the correct ROMs,

or does not see the downloaded ones after creating FTFs

1. FlashTool ( older versions) Allthoug this shows the downloaded and created FTF files, all of them do not flash because of a lot of INCORRECT version within the downloaded files?

Anyone walked these roads before or have a simple method of reverting to Android on XA2 Ultra?

e.g. Is it possible to go back to the stock rom of my Sony XA2 Ultra, that does not refer to this only article that I allready found and does not work for me ( see point 1) https://jolla.zendesk.com/hc/en-us/articles/115004283713-Reverting-Xperia-to-Android-OS-and-reinstalling-Sailfish-OS

p.s.:

So what I suspected about EMMA was correct ( bootloader unlocked because of Sailfish Installation)

This is what Sony Xperia Companion tells me:

Is there an extensive / complete user guide on how to UN install Sailfish OS and revert back to Android?

I have tried the following but failed in many different ways:

1. EMMA: It fails ? to correctly identify my XA2 Ultra (1312-4773), so doesn't do anything: Because of Unlocked bootloader?

1. FlashTool (Sony Mobile Flasher by Androxyde) latest version): It does not provide me with the correct ROMs,

or does not see the downloaded ones after creating FTFs

1. FlashTool ( older versions) Allthoug this shows the downloaded and created FTF files, all of them do not flash because of a lot of INCORRECT version within the downloaded files?

Anyone walked these roads before or have a simple method of reverting to Android on XA2 Ultra?

e.g. Is it possible to go back to the stock rom of my Sony XA2 Ultra, that does not refer to this only article that I allready found and does not work for me ( see point 1) https://jolla.zendesk.com/hc/en-us/articles/115004283713-Reverting-Xperia-to-Android-OS-and-reinstalling-Sailfish-OS

p.s.:

So what I suspected about EMMA was correct ( bootloader unlocked because of Sailfish Installation)

This is what Sony Xperia Companion tells me:

Is there an extensive / complete user guide on how to UN install Sailfish OS and revert back to Android?

I have tried the following but failed in many different ways:

1. EMMA: It fails ? to correctly identify my XA2 Ultra (1312-4773),

so doesn't do anything: Because of Unlocked bootloader?

1. FlashTool (Sony Mobile Flasher by Androxyde) latest version): It does not provide me with the correct ROMs,

or does not see the downloaded ones after creating FTFs

1. FlashTool ( older versions) Allthoug this shows the downloaded and created FTF files, all of them do not flash because of a lot of INCORRECT version within the downloaded files?

Anyone walked these roads before or have a simple method of reverting to Android on XA2 Ultra?

e.g. Is it possible to go back to the stock rom of my Sony XA2 Ultra, that does not refer to this only article that I allready found and does not work for me ( see point 1) https://jolla.zendesk.com/hc/en-us/articles/115004283713-Reverting-Xperia-to-Android-OS-and-reinstalling-Sailfish-OS

p.s.:

So what I suspected about EMMA was correct ( bootloader unlocked because of Sailfish Installation)

This is what Sony Xperia Companion tells me: