| Business | Phone |
| Cellular Center 4122 Dyer St, Union City 94587 | (510) 471-8887 |
| Cellular Phone Distributors 2807 Whipple Rd, Union City 94587 | (510) 441-6181 |
| Cellular Systems 30071 Industrial Pkwy, Union City 94587 | (510) 475-8282 |
| Cellular Warehouse 30600 Dyer St, Union City 94587 | (510) 471-7400 |
| Celluphone 32970 Alvarado Niles Rd # 744, Union City 94587 | (510) 477-9400 |
| Cingular Wireless 30870 Dyer St, Union City 94587 | (510) 441-3034 |
| Cingular Wireless 32280 Dyer St, Union City 94587 | (510) 487-6600 |
| Radio Shack 1784 Decoto Rd, Union City 94587 | (510) 441-7964 |
| Radio Shack 32362 Dyer St, Union City 94587 | (510) 489-1677 |