After the upgrade,
There are many issues.
The camera result has been compromised like when you take a photo its colors are not good at all.
When you zoom it has distortions.
The ringer volume automatically gets lower.
And overall one ui is horrible.
Call application process has become lengthy as compared to the oreo.
If a contact has more then one number you everytime have to open details and select.
As previously it was easy click a cantact it will disply numbers click on desired nm and call