I bought my S9 1 month ago and everything seemed to work fine, smooth. In the moment of switching to pie phone began lagging alot. Every animation between switching from home screen to all apps laggs. Every opening of all apps to clear up glitches and flickers onto the app next to the one im using at the moment. Not that this update improved the performance, it reduced it drastically. Not only that I dont suggest you to update to PIE but i suggest you not to buy Samsung if this issue won't clear up soon! Very dissapointed.
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