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When i answer or make a call through sync 4, it sounds like a very bad overseas call. I can hear words but can't possibly understand them. I have to send the call to the phone and use speaker. Is there a way to reboot sync or something. Very annoying.
Year of the truck? My FIL had a '22 that had this issue over wireless but plugged in it was fine. Some years were better about this than others, but it was a pretty common issue. Not sure if new updates to Sync and/or phones fixed it, it did for some but not others. It could ALSO be the radio unit itself being bad - some guys had theirs replaced and it fixed the issue as well.
Actually, it was connected by cable, or so I thought. I disconnected the cable and tried it, same problem. Put the cable back in and now it seems to work ok. Perhaps the cable had a bad connection and I was actually on bt even though the phone was charging.
Try the truck reset. Then test. Make sure the phone is up to date as well. Then do a hard reset on it. That way both the truck and your phone are fresh. See if the problem persists.
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