Dude... It would have been better to ask before you unlocked. Emma is not the tool to switch to another firmware, you can use flashtool or newflasher for that. These work without unlocking your phone.
Unfortunately i did not know that. What makes me really want to update my phone by any how is the very disturbing wifi problem. On oreo, wifi signal with my xzp is lost every couple of minutes. I posted on sony forums but they did not reply back. They did not even admit having the issue. It was a very bad experience as my first sony phone and i don't think i would repeat it.
During the unlock process, Sony deletes your DRM keys. If you didn't backup your DRM keys before you did the unlock, you lost the keys which are unique to your specific phone.
I don't know what are DRM keys. I will search on the forum to learn more about that. If you can suggest some topics/threads to start with, i will be really grateful.
Without DRM keys your camera quality goes down, some screen enhancements no longer work and some sound enhancement are disabled.
Also your phone now no longer supports widefine l1. Which means no more HD HDR video from Netflix on your phone. And there are probably some apps that now no longer install on your phone because of this.
I'm really upset. Since this was my first experience to install a rom on my phone by myself, i was not aware of these consequences. Seems that to fix the problem with wifi, i lost more features!
I'm really angry at Sony that they do this during the unlock process. Especially because their warning is not scary enough to make people think and read some more before doing the unlock.
If you like to have some of these features back, you can go back to Oreo and install a DRM fix after rooting your phone. But no DRM fix is available for Pie yet. Good luck. A lot of information about this is available on this forum.
I will search in this forum to learn more and if you can direct me to some links, this will be very helpful.
