EXHIBIT 4 BACKUP PURCHASE AGREEMENT BACKUP PURCHASE AGREEMENT, dated as of July 2, 2001 (this "AGREEMENT"), among Z-Tel Communications, Inc. a Delaware corporation ("COMMUNICATIONS"), Touch 1 Communications, Inc., an Alabama corporation, ("TOUCH 1"...Backup Purchase Agreement • July 12th, 2001 • 1818 Fund Lp Brown Brothers Harriman Co Long T Michael Et Al • New York
