Symptoms
- A pop-up or notification warns the cable or charger isn't certified or genuine
- Charging still works but slowly after the warning
- Warning appears with certain cables but not others
- Warning happens with a new, unfamiliar cable
Likely causes
- CommonUsing a non-certified or third-party cable that doesn't meet the phone's expected communication standardSome phones actively check for certification chips or signaling in the cable and warn if it's missing.
- CommonA cheap or counterfeit cable lacking proper internal componentsLow-quality cables can lack the electronics needed for the phone to verify safe operation.
- PossibleA worn cable that used to be recognized but now fails verificationPhysical or internal wear can cause a previously fine cable to start triggering the warning.
- Less commonA software update tightening how strictly the phone checks accessoriesAn update can occasionally introduce stricter checks that flag cables that worked before.
What to do
- Try a different, known-brand or manufacturer-provided cable to see if the warning goes away.
- Avoid continuing to use a cable that consistently triggers this warning, especially for fast charging.
- Check if the cable is visibly damaged or unusually cheap, which supports replacing it.
- Note whether charging still completes, even slowly, since the phone often still allows basic charging despite the warning.
- Buy a replacement cable from a reputable retailer or the phone manufacturer directly.
- Avoid off-brand cables for regular use going forward if this keeps happening.
- Update the phone's software in case a recent update is being overly strict with a cable that's actually fine.
- If even the phone's original cable triggers the warning, the issue may be with the port rather than the cable.
Tools and parts
Manufacturer or certified replacement cableSearch: “certified USB-C cable for your Android phone”
When to call a pro
This is generally solved by switching to a certified cable; if the phone's own original cable also triggers the warning, have the port checked professionally.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.