I have an AT&T Lumia 1520 with the Cyan update (no DP) and I can't get the Bluetooth to stay connected at all.. I had no issues pairing the band with the phone and it syncs just fine with the Health app when it's open. But Bluetooth between the phone and the band just won't stay connected. I've tried connecting via the phone's Bluetooth settings, but all I get is :Connecting - Connected - Paired, with about a second between each state. It connects for a second and then it drops. Bluetooth icon turns off on the phone and on the band. I've tried many times. Sometimes, I even get "Couldn't connect". This is so frustrating! One of the reasons I got the Band was for notifications (texts, etc.), but if the Bluetooth can't stay connected, this becomes nothing more than a fitness tracker. I have tried powering the phone and the band off and on, and I've tried resetting the band. Still not working. I'll try turning everything off and resetting the band a couple more times. I'll even try unpairing all the other devices in my Bluetooth settings, leaving the band as the only one. We'll see if that helps. If not, I'll be calling Microsoft support. Not sure what else to do. Anyone have any other ideas? It's pretty pathetic this isn't working with a Windows flagship phone. So far, my experience with the band has been disappointing. I really don't understand why the Bluetooth won't stay connected at all. I don't have this problem with other devices (like speakers, headphones, etc.), but I have noticed my Bluetooth does a little while to connect and turn on.