Hi fellow iPhone users,
I have a question regarding Bluetooth (BT) connectivity when the iPhone 4 (iOS 6.1.2) switches to standby.
This is what I observed:
I have a JVC KD-R741BT car radio which uses BT to act as a hands free kit. Furthermore it supports audio streaming.
Pairing the radio and the iPhone was not a problem. Also telephone and music streaming works fine. But if the connected iPhone goes into standby (no active call and no audio streaming) the BT connection gets lost around 30 seconds after the lock screen switches on.
I doubt that this is the radio's fault because I tested the radio with another phone and the connection stayed alive even when the phone idled. Vice versa I tested my iPhone with another car kit (SIEMENS HKW-720 and I got the same result - around 30 seconds after the lock screen the connection was terminated).
Then I did another little test with my MacBook Pro (MBP). First I connected an iPad 2 (iOS 6.1.2) to the MBP and switched on the iPad's lock screen. Even after 15 minutes in standby the BT connection was still alive (according to the MBP's BT device manager).
Then I wanted to try the same with the iPhone. However, I was not even able to connect at all. According to my MBP, pairing was successful. Both devices appeared on their lists of known devices. First, I clicked on "Not connected" (I don't know the exact English wording because my iPhone's language is German... ). But instead of changing to "Connected" I got: "Connection failed - "macbook" is not supported. - Ignore device." Trying to connect from the "other side" brought up the following message on my MacBook's screen: "The Bluetooth network is unavailable. - There was an error connecting to your device's network. Make sure network access is enabled and available on your device."
So the questions are:
Why I can not connect my iPhone to my MBP at all? And why will the BT connection be switched off when the iPhone switches to standby? I doubt that this is the intended behaviour...
Oh, and I checked the log files. I have many "BTServer" incidents there. In most cases the BT PowerMgr crashed... Maybe this information helps...