Check the charger
Try a compatible cable and adapter that are working properly. Check for visible damage and avoid continuing to use a damaged accessory.
Don't force the connector
If the cable is loose or only charges in one position, don't force it or insert metal objects. The charging port may need to be checked.
Request an inspection
Tell us the model, when the problem started, and whether the phone has been dropped or exposed to moisture. At TintaTec we check the battery and connector to identify the cause before recommending a repair.