There are a couple of ways you can pair the Anker Soundcore Liberty 4 NC, either through the Soundcore app or manually. Here’s the foolproof method, regardless of your device.
Enable Bluetooth in your device’s settings.
Open the case and press the case button until the indicator lights blink.
Select the earbuds in your Bluetooth settings list of available devices, and you’re done.
Optionally, you can open the Soundcore app to complete the setup.