While it may appear to be a standard Android-based OS, several security audits and user reports have raised significant red flags regarding its authenticity and safety: Key Concerns and Security Risks Hardware Spoofing
BigdroidOS 2.0.1 (likely what you mean by "201 2021") is a custom operating system based on Android 12 bigdroidos 201 2021
BigDroidOS 201 2021 competes with other popular operating systems, including: While it may appear to be a standard