After one plus 9pro disconnected the Bluetooth headset screen, the SMS prompt tone disappeared.

Normal phenomenon, maybe you turned on mute mode.

One Plus (20 13 12) was established, with its headquarters in Shenzhen, China [2]. As an international brand that focuses on building high-end flagship products, Yijia Technology adheres to the brand spirit of "No Will Do" to build high-quality products and is committed to sharing high-quality technology with the world.

One Plus Technology has a market in more than 30 countries and regions around the world, with employees from 26 countries and 6 R&D centers located in Shenzhen, Taipei, Nanjing, Shanghai, San Diego and Hyderabad, gathering the advantages of different regions around the world, relying on the strong R&D strength to bring better innovative products and experiences to users, and its mobile phone products have successively won the "European Audiovisual Association (EISA) Annual Award". Today, Yijia 1 has more than 5.5 million community users from 196 countries and regions, including young people who are keen on interacting with brands, such as technology lovers, designers, college students and industry experts.