| Answer | Crossword Clue |
|---|---|
| DEF | Number 3, on the phone |
| DEF | Phone button trio on number 3 |
| DEF | 3 on the phone |
| DEF | Phone letters on the "3" button |
| callbacks | A security feature used by systems accessed by telephone, in which a remote user must log on using a previously registered phone number, to which the system then places a return call |
| DEF | 3, on a phone |
| DEF | 3 on a phone |
