| Business | Phone |
| Cellular America 8801 Baltimore National Pike, Ellicott City 21043 | (410) 465-0218 |
| Compass Wireless Comm 9191 Baltimore National Pike, Ellicott City 21042 | (410) 203-9960 |
| Nationwide Wireless 3355 Saint Johns Ln # E, Ellicott City 21042 | (410) 480-0200 |