| Clue | Source | Date |
|---|---|---|
| Sign of awful cell service ... or what 20-, 39- and 57-Across have in common | Universal | 15 Apr 2026 |
| Sign of terrible service | New York Times | 27 Mar 2025 |
| Cell dead spot indicator | LA Times Daily | 13 Jan 2019 |
| Cell dead spot indicator | ||
| Cell dead spot indicator |