| Business | Phone |
| Cal Com Systems Inc 2001 Omega Rd # 201, San Ramon 94583 | (925) 362-9525 |
| All Wireless Pcs 21001 San Ramon Valley Blvd, San Ramon 94583 | (925) 556-0900 |
| Campus Wireless 2678 Bishop Dr, San Ramon 94583 | (925) 328-1143 |
| Cellular Warehouse 2005 Crow Canyon Pl, San Ramon 94583 | (925) 277-0600 |
| Cingular Wireless 9110 Alcosta Blvd, San Ramon 94583 | (925) 551-5900 |
| Peninsula Engineering Sltns 39 Grand Canyon Ln, San Ramon 94582 | (925) 901-0103 |
| Planet Cellular 2010 Crow Canyon Pl, San Ramon 94583 | (925) 824-3103 |