NUBBYO E3 True Wireless Earbuds User manual

Hello! I've reviewed the user manual for the E3 earbuds. This document provides instructions on how to use the earbuds, including pairing, controlling music and calls, and charging. It also covers safety information and troubleshooting. I’m ready to answer your questions about the device.
Why these earbuds can not pair with my mobile phones?

Why does the music cut in or cut out?

Why does the earbuds can not be chagrged and not disconnected with my phone even earbuds are put into case and I have closed the case?