Hello Sophie, > 1) Commonly, both sides will hear nothing. > 2) Less commonly, audio on my side from the other person will be > heavily distorted (but speech can *barely* be made out) but I am heard > with no problem on the other side. > > I'm assuming this is some kind of codec issue - maybe 4.2 doesn't > include newer codecs and whether or not 1) or 2) happens might depend > on whether the other side can fall back to older ones? - but that's a > complete guess on my part. However, it used to be that calls would > work fine, then some calls would fail in one of these two ways, and > now pretty much every mobile call will fail. > > Is my diagnosis of the problem correct, or is there something else > going on here?
I would say you guess is quite good. I had the same as you described in the second point some years ago (already with Replicant 6.3). I figured out that it only happened with 3G, hence setting the preference to 2G was a quick workaround. Since I knew that it had worked before and I switched the hardware (another i9300) my best guess was that it has to be caused by an older or more buggy baseband firmware. If I remember correctly updating that one fixed the issue. You may check your baseband firmware revision. Mine is 'I9300XXUGNA8'. Updating the baseband needs Windows tools, at least as far as I know. But perhaps there are alternatives. Regards, doak
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