Use your cellphone with your home or office phone system

Last week I told you about how I solved my AT&T “no reception” problem at my office in San Ramon. (https://realtytechbytes.com/solve-poor-att-reception/) The solution works perfectly…if I want to use the speaker phone on my iPhone.  If I pick up the phone to answer it I lose my reception!  That’s because in order for the phone…