How do I get >>> free cell phone minutes via home based pc

How do I get >>> free cell phone minutes via home based pc

Geesh I read about this now I cannot find it again.

What i understood was while away from my pc minutes are billed as per
the norm

But while at home I connect my cell through my pc or mac and the minutes
are then free.

Please help direct me back in the right direction

I am currently using Verizon for my cell and I will be giving up my
landline while on the road so i am trying to keep costs down.

Preferably I would like a 2-3 phone plan.

TIA
Jan