Im so glad im not the only one with this issue. I have an iphone xs max or i dont know wtf letters it has but for sure an iphone max and as soon as i update to ios14 my bars kept dropping wouldnt come back even when i restart the phone then 5 minutes later it worked, calls would suddenly drop cant hear anyone on the line and apps would suddenly freeze. I am getting an android though and never getting an apple ever again. The only reason i got it was because my car has apple car play and not android play. Fix these issues ur phones are broken.