This company called me on my business phone and told me they were from verizon and asked if I read the insert in my last bill from verizon. They told me that verizon enterprise solutions was no longer handling long distance and if I did not swith today I would not have long distance.. Dont believe it.. they lied to me. I contacted verizon a week later because I felt this was wrong and lo and behold I was right so I had to switch everyghing back to verizon.. ISI also took my local calling as well without my permision. RIP OFF dont trust them