Anyone experiencing issues calling or texting due a error communicating with the Sim card? I get it about every 5th call and about every 3rd text. Weird.
Found the Sim card was at fault. These s21's need the new 5g Sim. All is well now.
johnson21, the card was originally in my note 4! The s21 is my first 5g phone.
So I was getting ready to ship my phone back being within the 14 day period due to getting Sim card errors. Not being able to consistently make calls or texts. It would really do it more when connected to wifi. So the true work around is enabling developer mode, enable cellular connection when on wifi. Problem is gone. And may I say samsung customer service has turned to garbage. A hot steaming pile of garbage...