After a long time on the phone supposed to get a return kit now, but still have to Airave lines. The old Airave 3 under one line, it says Airrve coverage. The new Airave 4 under a different line. It Says Voice/LTE Service Enhancement. Is that what all new Airave 4 lines say? No one seems to know how to cancel the Airave 3 line I sent back in.