| Answer | Crossword Clue |
|---|---|
| PRS | Old phone trio |
| ABC | Phone trio |
| MNO | Phone trio |
| GHI | Phone trio |
| DEF | Phone trio |
| MNO | Phone dial trio |
| MNO | Phone-dial trio |
| PRS | Phone-dial trio |
| ABC | Phone button trio |
| PRS | Seven's phone trio |
| DEF | Phone button trio |
| MNO | Phone button trio |
| DEF | Phone-dial trio |
| PRS | Seven's former phone trio |
| MNO | Trio on a phone keypad |
| DEF | Phone button trio on number 3 |
