| Business | Phone |
| Get Wireless 2775 Clayton Rd, Concord 94519 | (925) 969-1300 |
| Quantum Star 1480 Wharton Way, Concord 94521 | (925) 686-9945 |
| Rhino Wireless 1957 Arnold Industrial Way, Concord 94520 | (925) 674-9214 |
| Adams Wireless 1 Sun Valley Mall, Concord 94520 | (925) 671-0930 |
| Digital Source 1 Sun Valley Mall, Concord 94520 | (925) 687-7800 |
| Mobile Systems Wireless 1 Sun Valley Mall, Concord 94520 | (925) 969-0607 |
| Nextel Retail 272 Sun Valley Mall, Concord 94520 | (925) 682-2355 |
| T Mobile Usa Inc 1855 Gateway Blvd, Concord 94520 | (925) 969-1989 |
| T-Mobile 252 Sun Valley Mall # 1, Concord 94520 | (925) 680-8762 |
| Touchdown Wireless 4475 Treat Blvd, Concord 94521 | (925) 685-4234 |