your redmi note 9s mobile charging port refusing to sync when you plug it in, frequent use of the charging port can cause problems. it’s fairly easy to dislodge internal components that make the redmi note 9s mobile charging port work properly. condensation can into the port and seep cause rust and damage to your redmi note 9s mobile. we can help you with redmi note 9s mobile repairs. you should try a few simple troubleshooting tasks to be sure that professional redmi note 9s mobile repair is what you need.