| Business | Phone |
| Abc Wireless Comm Inc 1437 W Schaumburg Rd, Schaumburg 60194 | (847) 524-1234 |
| Alpha-Communications Inc 1321 Tower Rd, Schaumburg 60173 | (847) 885-9920 |
| Apollo Communications 32 E Golf Rd, Schaumburg 60173 | (773) 638-2000 |
| Everything Mobile Inc 5 Woodfield Mall, Schaumburg 60173 | (847) 413-9433 |
| Enterprise Networking Systems 1821 Walden Office Sq 400, Schaumburg 60173 | (847) 397-6030 |