Blued relies heavily on cloud servers. The company frequently deprecates old API versions. Even if you successfully install version 3.6.0, you may find that:
This paper examines the risks associated with downloading older versions of APK files from unofficial sources, using Blued 3.6.0 as a case study. It highlights potential malware injection, data interception, and violation of platform policies. blued 3.6.0 apk download
Open your Downloads folder, tap the APK file, then tap Install . Confirm any warning prompts. Blued relies heavily on cloud servers