Symptoms
- Crackling or static sound layered over the caller's voice
- Static is worse when moving or near electronics
- Only happens on certain calls, not all
- Static occurs even with headphones connected
Likely causes
- CommonWeak cellular signalMarginal signal strength commonly introduces static or crackling on voice calls.
- CommonInterference from nearby electronicsDevices like speakers, microwaves, or other phones can create radio interference.
- PossibleDebris in the charging port affecting a wired headset connectionIf using wired headphones, a dirty port can cause a poor connection and static.
- PossibleDamaged headphone or charging cableA frayed or damaged cable used for wired calls can introduce static.
- Less commonSpeaker or mic hardware issuePhysical damage to the speaker or mic can produce a persistent static sound.
What to do
- Move to an area with better cellular signal and see if the static reduces.
- Move away from other electronics like speakers, chargers, or other phones during the call.
- If using wired headphones, unplug and replug them, checking the port for lint first.
- Try a different cable or headphones to rule out a damaged wire.
- Switch to the phone's built-in speaker and mic to see if static persists without any accessory.
- Restart the phone to reset its cellular radio.
- Test with Wi-Fi Calling turned off if it's enabled, to isolate a cellular versus internet call issue.
- If static happens on every call regardless of location, accessory, or connection type, have the phone's speaker and mic checked.
Tools and parts
- Flashlight
- Soft-bristled brush
Replacement headphone or charging cableSearch: “phone charging cable with headphone adapter”
When to call a pro
If static persists on every call and connection type after these checks, have the phone's internal speaker and mic tested professionally.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.