your xiaomi redmi note 9 4g 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 xiaomi redmi note 9 4g mobile charging port work properly. condensation can into the port and seep cause rust and damage to your xiaomi redmi note 9 4g mobile. we can help you with xiaomi redmi note 9 4g mobile repairs. you should try a few simple troubleshooting tasks to be sure that professional xiaomi redmi note 9 4g mobile repair is what you need.