But there must be a service menu to figure out if AMR-WB is activated or not? For example, the S4 has HD Voice capability but people have figured out how to activate it in the service menu.
Does AMR-WB only work when LTE is activated? I get frequent call drops on my Nexus 5 and some people have gotten relief when they disable LTE and switch to 3G.
It is quite bizarre that on Rogers/Fido, Canada's largest network, they say that only certain phones support HD Voice. The Galaxy Nexus is supported but the Nexus 4 and 5 or not supported! I even called and asked!
I was making some calls today, where I had LTE. The expected behaviour would be that the device switches to 3G for voice calls, but it seems to me like my N5 is using 2G. So it seems that despite being on a network which i know has working HD Voice, the Nexus 5 doesn't work. Bummer.
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