Published: October 2023 Device: Samsung Galaxy Tab S4 (Wi-Fi) – Model SM-R800

| Android Version | One UI Version | Release Status | Security Patch Level (Final) | |----------------|----------------|----------------|-------------------------------| | 8.0 Oreo | Experience 9.0 | Launch (2018) | N/A | | 9.0 Pie | One UI 1.1 | April 2019 | N/A | | 10 (Q) | One UI 2.1 | April 2020 | August 2021 (final) |

| Symptom | Likely Cause | Solution | |---------|--------------|----------| | Boot loop (stuck on Samsung logo) | Corrupted system partition after failed OTA | Reflash stock firmware via Odin | | Wi-Fi MAC address changed to 02:00:00:00:00:00 | Corrupted EFS (Encrypted File System) partition | Restore EFS backup (requires root prior) | | "Only official released binaries are allowed" error | Bootloader locked after unofficial firmware flash | Reflash official Samsung firmware with matching binary bit | | Touch screen unresponsive after update | Mismatched touch firmware (rare) | Downgrade to previous known-good firmware version (if bootloader allows) | | Battery drains in 2 hours | Background process stuck due to dirty firmware upgrade | Factory reset via recovery, then reflash full firmware package | Because Samsung no longer pushes OTA updates, manual flashing is the only way to recover a bricked or outdated device. This process erases all data.