Android Question

After years of using Plantronics headsets finally upgraded to the Legend from the Voyager PRO. I returned the first one thinking it was a headset issue, but now on the second one it is doing the same thing. After being on the call for less than a minute, it will disconnect and move back to the handset, to only 30 seconds later reconnect again. I had used the significant others Legend headset fine when my battery would die in the past but even now trialing his out again it will do the same thing? Any suggestions?