| ABC WIRELESS COMM INC | 1437 W SCHAUMBURG RD SCHAUMBURG, IL | (847) 524-1234 |
| APOLLO COMMUNICATIONS | 32 E GOLF RD SCHAUMBURG, IL | (847) 519-1001 |
| CINGULAR WIRELESS | 930 NATIONAL PKWY SCHAUMBURG, IL | (847) 658-8484 |
| CINGULAR WIRELESS | 930 NATIONAL PKWY SCHAUMBURG, IL | (847) 762-2000 |
| CUSTOMER OPERATIONS | 930 NATIONAL PKWY SCHAUMBURG, IL | (847) 413-7700 |
| DATATEL INC | 1520 CREEKSIDE DR SCHAUMBURG, IL | (847) 519-0753 |
| DISCOUNT CELLULAR | 2507 W SCHAUMBURG RD SCHAUMBURG, IL | (847) 301-7899 |
| EVERYTHING MOBIL INC | 5 WOODFIELD MALL SCHAUMBURG, IL | (847) 995-1980 |
| FUTURE WAVE COMMUNICATIONS INC | 919 N PLUM GROVE RD SCHAUMBURG, IL | (847) 755-4475 |
| JOHN ROBERT ASSOCIATES | 850 E HIGGINS RD SCHAUMBURG, IL | (847) 240-2300 |
| NORTEL NETWORKS | 475 N MARTINGALE RD SCHAUMBURG, IL | (847) 706-8000 |
| NORTHWESTERN COMMUNICATIONS INC | 1901 WRIGHT BLVD SCHAUMBURG, IL | (847) 534-6700 |
| PLAZA WIRELESS | 883 S ROSELLE RD SCHAUMBURG, IL | (847) 352-1900 |
| PRIMECO | 2570 W SCHAUMBURG RD SCHAUMBURG, IL | (847) 884-7546 |
| T MI OFFICE SYSTEMS | 735 ESTES AVE SCHAUMBURG, IL | (847) 534-8288 |
| TELSYSTEMS INC | 1931 N MEACHAM RD SCHAUMBURG, IL | (847) 303-1500 |
| TOUCH COMMUNICATIONS | 1000 E WOODFIELD RD SCHAUMBURG, IL | (847) 468-8000 |
| VERIZON WIRELESS | 5 WOODFIELD MALL SCHAUMBURG, IL | (847) 619-0773 |
| WIRELESS PLANET | 223 W GOLF RD SCHAUMBURG, IL | (847) 310-0200 |