[Nexus 4 Q&A, Help & Troubleshooting] gilgamesh0:
Hi all.

Here's what I'm seeing and what I'm trying to figure out.

On my new Nexus 4, which in other respects seems just fine, voice over Bluetooth is basically unusable. I first tried testing out voice commands for dialing etc., which consistently failed. A friend happened to call while I was doing this, and could barely make out what I was saying (reported it as choppy, digitized etc.).

This is using a Plantronics Discovery 975. Which works fine with my Nexus One, so isn't a faulty headset (I even had my wife's same model headset and tried it also). I don't have any other headsets handy.

This N4 *has* been upgraded to 4.2.1. After searching a bit, I found numerous reports and a couple articles re many BT features, including voice over BT, being broken to a great extent on many devices with 4.2.1 (or earlier, and getting still worse in 4.2.1). Those reports, however, mostly seemed to reference devices other than the N4 (though perhaps only due to its newness & relative scarcity, hard to know).

I then tried the headsets with my wife's Galaxy Nexus, which also had been upgraded to 4.2.1. On that, however, the voice over BT apparently worked fine, or at least much better -- sounded ok, and VR could recognize contacts to be called.

Thus I could at least conclude it isn't just voice over BT simply broken in 4.2.1 everywhere (which would have made things simple.. :P), and it isn't simply voice over BT in 4.2.1 with the Discovery 975 either. So add in the Nexus 4.

I've seen many reports of BT streaming audio issues on the N4 with 4.2.1, but little at all about voice, and certainly some successful reports for voice.

So I'm trying to figure out: What is the likelihood that with all of the 4.2.1 Bluetooth troubles, there is a consequent BT software issue on my Nexus 4 when used with this Discovery 975 headset? Vs., what is the likelihood that my specific N4 has some kind of hardware issue with BT?

- How many folks are using voice over BT successfully? Anyone else having issues?

- What version does your N4 have -- 4.2.1, or earlier?

- If you used it *before* an upgrade to 4.2.1, did it work both before and after the upgrade, or did the upgrade introduce issues?

- Anyone specifically using the Plantronics Discovery 975, or another Plantronics?

Basically, I'd really like to avoid the crap shoot of exchanging the phone (BT voice is a critical feature for me), since it seems fine in all other respects, and with all of the manifest BT issues that appear to have been introduced with 4.2.1, that seems like at least a reasonable culprit.

However, if there aren't widespread issues with voice over BT on the N4 with 4.2.1, then it would seem the only way it would be a software issue, would be if it's the combination with my particular Plantronics headset model. Otherwise, I think I'd have to face the possibility of a hw issue. (Bad timing for me with 4.2.1's buggy BT issues, it really obscures the situation. :( )

Another useful test for me to try might be to revert back to the prior OS version and test with that, but I gather I have to root to do that, not sure if that also voids the warranty.. (hence preventing me from exchanging it if I did ultimately need to).

TIA