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adb shell pm remove-user 0 By 2022, Samsung patched multiple entry points to “Developer options” during setup. Moreover, even if ADB was enabled, the device would require authorization (RSA key fingerprint) that could not be granted during setup. | Factor | 2020–2021 | 2022 (One UI 4.1+) | |--------|-----------|--------------------| | Setup wizard ADB enablement | Possible via TalkBack + Settings | Blocked – Settings menu restricted | | OEM unlocking | Sometimes accessible | Hidden until device fully activated | | ADB authorization | Often skipped via custom ROMs | RSA prompt mandatory, no bypass | | Security patch level | Up to Dec 2021 | Jan 2022 – Dec 2022 patches active |

Abstract Factory Reset Protection (FRP) is a critical security feature on Samsung devices running Android 5.0 and above. By 2022, Samsung had significantly hardened its FRP implementation, particularly on One UI 4.1 (Android 12) and later. Traditional bypass methods relied heavily on enabling Android Debug Bridge (ADB) via hidden menus or accessibility exploits. However, with the 2022 security patches, many ADB-dependent vectors were patched. This paper explores the technical evolution of FRP on Samsung devices in 2022, analyzes why ADB enablement became difficult or impossible on patched firmware, and documents the ADB-free techniques that security researchers and technicians used during that period. 1. Introduction Factory Reset Protection (FRP) is a Google-mandated anti-theft feature that locks a device after a factory reset unless the previous Google account credentials are entered. Samsung devices implement FRP at the framework level, tightly integrated with their Knox security platform. By early 2022, Samsung had released security patches for One UI 4.0 and 4.1 that specifically targeted common FRP bypass vectors, including those that enabled ADB from the setup wizard (SetupWizard).

| Tool Name | Mechanism | ADB Required? | |-----------|-----------|----------------| | | Uses download mode + combination file | No (uses Odin protocol) | | Tenorshare 4uKey for Android | Custom recovery injection | No | | iMyFone LockWiper (Android) | Exploits MTP + database editing | No |

 

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