| Business | Phone |
| Gab It Up Wireless 2951 Harbor St, Pittsburg 94565 | (925) 427-1100 |
| Nextel Retail 1269 California Ave, Pittsburg 94565 | (925) 473-0735 |
| Sprint Pcs Personal Comm 4297 Century Blvd, Pittsburg 94565 | (925) 776-1000 |
| Touch Down Wireless 2121 Loveridge Rd, Pittsburg 94565 | (925) 439-5100 |