iPhoe 4S can no longer pair with Plantronics M1100 headset
I have an iPhone 4S running iOS 6.1.3 and a Plantronics M1100 headset. The Bluetooth connection has worked fine until today.
The phone "forgot" about the headset. So I went into pairing mode, located the device name within the Bluetooth settings on the phone and selected it. Although the headset says "pairing successful", the phone says "Pairing Unsuccessful - Make sure PLT_M1100 is turned on, in range and is ready to pair."
I have tried rebooting the phone but the behavior is the same.
Any ideas on how to fix this problem?
iPhone 4S, iOS 6.1.3, Plantronics M1100