| Clue | Source | Date |
|---|---|---|
| Phone service: 2 wds. | ||
| ... Music-playing service? .. | Universal | 03 May 2021 |
| 'Please hold' phone feature | USA Today | 14 Dec 2018 |
| "Please hold" phone feature | ||
| Phone service option | ||
| Phone service option | ||
| Phone service option | ||
| Phone service add-on | ||
| Phone service extra | ||
| Phone-owner's convenience | ||
| Phone service extra | ||
| Busy-signal thwarter | ||
| Busy-signal thwarter |