More on Bluetooth Function

I haven’t been using the Bluetooth function on the HU for a while. As I have recently gotten an Android phone (HTC Desire), I thought I would pair with the HU so that I can use the hands-free function again while I drive.


However when I tried to add a new device on the Bluetooth screen that button is gray-out. I was thinking is that something wrong with my Bluetooth function? After fiddling with the Bluetooth options for a while then only I realized the hands-free function can only be paired with a maximum of 5 Bluetooth-enabled phones. I have previously been testing and showing the Bluetooth function to other AOC members so I have maxed out the pairing.

I deleted all the old phones entry from the Bluetooth option screen and I can now add my Android phone. I also tried pairing my wife’s iPhone 4 with the HU without any problem. I was thinking how would the HU know which phone to pair with if both my wife and I turn on the Bluetooth function in our phone at the same time. Well the HU keep track of the last paired and connected Bluetooth phone. The next time when that same phone is found, it will be paired and connected. So if you find that you Bluetooth is not pairing with you own phone for whatever reason, you might have change the preference the last time you fiddle with the Bluetooth screen.

Given that the iPhone can pair with the HU, then the next question is whether an iPad can be paired with the HU and be use to control the HU function. Theoretically I don’t think it work. However I don’t have an iPad so I would need to “borrow” one to try it out.

An interesting discovery I had is that both the Android and iPhone can be paired with the HU but they can’t be paired with each other. Both are based on Bluetooth 2.1 with Enhanced Data Rate technology but somehow during the authentication, the passkey entry screen is not prompted so there is no way for the pairing to complete.

I met an old friend at the driving range last Friday and we also tried to pair his Samsung Galaxy S with my HTC Desire. Still we can’t get the pairing to work. I have been doing a bit of research and I think there are many other HTC Desire owners are also having the same problem. I haven’t found an answer to this problem yet. I guess I will have to wait for the next firmware update from HTC to see if this problem is resolved.