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After my Aqua Fish battery died, I got Xperia XA2 Ultra few months back hoping I could install Sailfish OS in it. I was waiting for a stable Sailfish X version and seems 3.1 is the right version to install.

But I've got few things to be clarified before I install it in my Xperia. The Known Issues section in the release notes says following items

1. Voice calls with Whatsapp are not usable as the voice volume level is minimal (if can be heard at all).
2. Do not upgrade Android to 9.0

My questions are

1. Are voice calls not heard when using phone speaker or while using headphones too (be it wired or bluetooth)?
2. Unfortunately I've upgraded to 9.0. Is there any way I can reset my XA2 to 8.x - the version I got when I bought the phone?

After my Aqua Fish battery died, I got Xperia XA2 Ultra few months back hoping I could install Sailfish OS in it. I was waiting for a stable Sailfish X version and seems 3.1 is the right version to install.

But I've got few things to be clarified before I install it in my Xperia. The Known Issues section in the release notes says following items

1. Voice calls with Whatsapp are not usable as the voice volume level is minimal (if can be heard at all).
2. Do not upgrade Android to 9.0

My questions are

1. Are voice calls not heard when using phone speaker or while using headphones too (be it wired or bluetooth)?
2. Unfortunately I've upgraded to 9.0. Is there any way I can reset my XA2 to 8.x - the version I got when I bought the phone?