Why is one AirPod not connecting to my phone?

The problem can be due to low battery, Bluetooth syncing or dirt on the charging contacts if one airpod not connecting . The solution is to put both AirPods into the case and reconnect them again, and, often, the issue gets solved. Additionally, you should also look for software updates for your device. Most of the times, reset is enough to ensure proper connectivity and to get both AirPods running again.