Since IOS 14.x.xx I am having issues iPhone 10S

Hi,
  1. I been having a lot of issues with I downloaded 14.x. I am having connectivity issues with wifi.

  2. When I try to call it takes three attempts:

a. it does not ring bell, moment I call someone it shows call failed.
b. it does not ring bell it directly goes to voice mail of destination contact.
c. it call and it rings.
Since IOS 14.x.xx I am having issues iPhone 10S
 
 
Q