I have 3 phones on my account. 2 are fine but one will not locate and in my account the message "untrusted SIM. A untrusted SIM card is present in the device! Unlock the device or mark it as FOUND to add the current SIM card to the list of trusted cards. Mark phone as found
I have marked as found the phone several times but the message remains the my.avast.com.
It is a Galaxy GTN 7100
One of the other phones is identical and working ok
Can you assist