Why is the charging case flashing red, the earbuds showing no lights, and why won't they pair with my phone?
Based on the HTC TWS9 manual, here is an explanation of the lights and steps to resolve your pairing issue: LED Meanings: A flashing…
Manuals+ Q&A
HTC TWS9 True Wireless Earbuds User Guide — questions & answers
Read product questions and troubleshooting answers linked to HTC TWS9 True Wireless Earbuds User Guide.