Summary: This headset works great. I bought it because they said it pairs with any AT&T DECT 6.0 phone, which happens to be the phone I have. What they don't make clear is that it works with any phone. If you have DECT 6.0, then you can pair the headset with an existing phone, but there is really no need to do this. It comes paired with the charging base, so there is really no reason to do any pairing with anything else.
Summary: I eagerly awaited this device only to be deeply disappointed. In my home office I have a 2-line cordless phone. This product both in specs and on the box claims that it "…works with Corded and Cordless 1-line and 2-line phones" Well it does not. Even the techs at AT&T say it only can work with a single line. Their work-around, use a series of splitters and keep changing connections as needed. I may as well hire a switchboard operator.
Summary: I bought this headet for work because I was tired of using a wired headset. I've had it three weeks and I've been very pleased with it so far. The clarity is great. I haven't had to adjust the volume at all and it pairs great with my existin cordless phone.