| Business | Phone |
| Cingular Wireless 3949 E Castro Valley Blvd, Castro Valley 94552 | (510) 582-2200 |
| Platinium Wireless 20862 Redwood Rd, Castro Valley 94546 | (510) 489-3008 |
| Hot Wireless 20862 Redwood Rd, Castro Valley 94546 | (510) 728-1262 |
| Rave Wireless 20862 Redwood Rd, Castro Valley 94546 | (510) 471-4793 |
| T Mobile 2724 Castro Valley Blvd, Castro Valley 94546 | (510) 728-0565 |
| Wireless Depot 20862 Redwood Rd, Castro Valley 94546 | (510) 889-9787 |
| Wireless Zone 20862 Redwood Rd, Castro Valley 94546 | (510) 728-1100 |