Symptoms
- Call quality or volume changed right after updating the phone
- Bluetooth pairing or audio routing behaves differently than before
- Settings that used to work now seem reset
- Other users report similar issues after the same update
Likely causes
- CommonUpdate reset certain audio or Bluetooth settings to defaultSome updates reset accessibility, sound, or connectivity settings that need to be reconfigured.
- CommonKnown bug in the specific software versionManufacturers sometimes ship an update with an audio bug that's fixed in a following patch.
- PossibleIncomplete update installationAn interrupted or partial update can leave some system components misconfigured.
- PossibleBluetooth device firmware incompatibility with new softwareAn older Bluetooth accessory may not fully work with the phone's updated Bluetooth stack until it also updates.
- Less commonCoincidental hardware issue unrelated to the updateOccasionally a hardware problem appears around the same time as an update by coincidence.
What to do
- Restart the phone fully, since some update-related glitches clear after a fresh boot.
- Check Settings > Sound and Bluetooth settings to make sure nothing was reset unexpectedly.
- Re-pair any Bluetooth devices used for calls.
- Check the manufacturer's support site or forums for known issues with the specific update version.
- Check for a follow-up update, since bug-fix patches often come quickly after a problematic release.
- Reset network settings (Settings > General > Reset > Reset Network Settings) if the issue seems connectivity-related.
- Test audio with and without Bluetooth to narrow down if the update affected wireless audio specifically.
- If the issue is widely reported for your update version, wait for the next patch or contact support for a temporary workaround.
When to call a pro
If the issue is a known widespread bug for a specific software version, contact the manufacturer's support for a timeline on the fix.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.