Question about upgrading stock nougat to stock oreo or pie

[finalgravity525]

Hi all. I recently got a U11. I know its already old model but I bought it only at 150 usd and its brand new and a 6/128gb no brand dual sim variant. Just recently updated it to latest nougat version but now I am thinking if its worth upgrading to oreo or pie when talking about performance and battery life. Currently getting around 6hrs SOT. What do you guys think?

Another question is if ever i try to update it to oreo, can I downgrade it to nougat again without unlocking bootloader or modding something?

Thanks and please forgive my bad english.

 

[aristidis_halk]

you can't downgrade without unlocking bootloader I think.
as for me I really don't remember how I was with nougat but oreo was perfect. I remember I redany comments about bad battery life but I was fine.

pie yes, don't ever update to pie. as for oreo I would say do it.