AT&T USA - Google Pixel and Devices with AT&T Device app Semi-Premium Unlock [ Past Due / Unpaid/ Contact/ Recently ] ratio 50-80%
This will work if you receive the following message in AT&T clean service:
"We can't unlock this device because of a past due or unpaid balance on the account"
"Looks like you have an unpaid or past due balance. to make a payment and then wait 24 hours before you submit a new request"
"We can't unlock this device because it hasn't been active for at least six months of paid service."
" Your device seems to be active on an AT&T customer’s account."
If phone is blacklisted (lost/stolen) ,has unpaid bills or is fraud will probably not work .
-Att imei network issue
-Imei active other
-Active on another account / active line
-Fraud => ratio 10-20%
-Lost => ratio 10-20%