The sound of this is very nice , but when I am doing sport it is going out of ear , this is not nice
We’re sorry to hear that your earbuds slip out while you’re doing sports — we understand how frustrating that can be. 
Please try adjusting the fit by following these suggestions:
Extend the earbud stems fully and insert each earbud into the inner canal of your ears. Then gently turn them until you find the most comfortable and secure position.
Place the earbud body into the concha cavity (the largest depression on the surface of your ear) and choose an ear‑tip size that creates a snug, comfortable seal.
To check if you’re wearing them properly, take the Fit Test in the Soundcore app — it helps ensure the perfect positioning for better stability and sound.
We hope these steps help improve your fit while exercising!