You may need to just return them. I have found thru experience that Kenwood and Uniden FRS band radios are the most reliable. Bell south has had a lot of issues with RF related products.
I was abel to make mine work I put one on chanel 20 then scanned with the other and pressed the ptt button on the unit on channel 20 until scanned one found transmition.
Like where way to set motorola Gp radio 2000