Need help desperately because this has ruined my phone for me. For the last couple month every time I call my wife (no idea why it only happens with her), The call quality is garbage. There is a constant rustling/whispering sound. The green button towards the left of the screen that lets you customize the call sound greys itself out and tells me it us "unavailable during wideband calls"
I have no idea what this means but I need to get rid of it before I smash this phone to pieces. Thank you. (If it matters my carrier is Sprint)
Sprint Androids contains a hidden setting for the vocoder in the EPST service menu.
Think of vocoders just like codecs for music. They vary a lot, not all in the phone are supported by Sprint.
You're describing a glitch where yours is whacked up now.
First, get your MSL number for your phone. If you're not rooted, call Sprint and ask nicely. If they refuse, call back. Most of the time they'll just tell you.
Phone ##3282#
Edit - input your MSL.
Advanced
Vocoder - enabled.
EVRC-B - enabled.
Home and Roam orig - both to EVRC-B.
Menu, commit changes, let it reboot.
Check both phones, each has its own MSL number.
The problem will either be solved or it's bad hardware (or bad LTE).
Do NOT experiment with other vocoder settings out of curiosity. Don't cry if you do, you've been warned.
PS - if you and your wife are both on LTE and both have HD Voice capable phones (like the Evo 4G LTE) then it will try to bypass the vocoders altogether.
This fix may help with that, not sure.
If not - turn off LTE (settings, Mobile network, Network mode), call your wife, then the vocoder fix has to work if both phones are good.
If everything else is scary, try that first.
