HUAWEI Mate 30 with versions earlier than 10.1.0.126(C00E125R5P3) have an information disclosure vulnerability. A logic judgment error occurs when the system handling Bluetooth connections, an attacker could craft as an authenticated Bluetooth peer to launch the attack. Successful exploit could cause information disclosure.
https://www.huawei.com/en/psirt/security-advisories/huawei-sa-20200617-02-smartphone-en