There are several reasons why a phone may not charge. It could be a problem with the charging cable, such as a frayed wire or a damaged connector. The charging port on the phone might be clogged with dust or debris, or it could be damaged. The power source, like a wall outlet or power bank, may not be working properly. If your phone isn't charging, try using a different charging cable and power source. Clean the charging port with a soft brush or compressed air. If the problem persists, consult a professional or contact the phone manufacturer's customer support. ????