Strange phone calls

I have been getting strange phone calls in the middle of the night.
The person hangs up when I pick up the phone.

In fact, I have never had a conversation with the phantom caller.
He or she always hangs up before saying anything.

I do not think that this is related to Steven Gibbs HDR,
or my use of the Hyper Dimensional Resonator.

But right after I bought Steven Gibbs HDR
I began to get strange call late at night.

Then it slowly went away, and now it is back!