I an on the "Do not call" registry. The man said he was from Frontier but I doubt it, as "Private Name" came up on my caller ID. I am reporting this number to the DNC Registry.
I received a call from this number stating that they can reduce my electric and phone bill, I subsequently called frontier to verify. They in fact did not call me and the caller is basically trying to get us to switch to their company for phone and electric. Unless you want to switch tell the persistent caller NO. They are not affiliated with either company. Tricky aren't they pretending to be your current company?