If you need to pair a new bud of realme Buds Air 2, please follow the steps below.
1. Put the replaced new earphone and the old single ear into the charging case, open the top cover of the charging case, and keep both earphones in the charging case.
2. Short-press the multi-function button 5 times to restore the factory settings (the indicator light will be off)
3. After restoring to factory settings, press and hold the multi-function key again for 3s (white light flashes), the earphones enter the Bluetooth pairing state, and the phone turns on the Bluetooth to complete the pairing.