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Samsung Galaxy S21 (SM-G991B) - ZTO - G991BXXU4CVC4 firmware
| PDA | G991BXXU4CVC4 |
| Product Code | ZTO |
| Security Patch | 2022-03-01 |
| Country | |
| Model | SM-G991B |
| Product Code | ZTO |
| Security Patch | 2022-03-01 |
| OS Version | Android 12 |
| PDA | G991BXXU4CVC4 |
| CSC | G991BOWO4CVB9 |
| Build Date | 2022-03-7 |
| Changelist | 23695702 |
| Country | |
| Model | SM-G991B |
| OS Version | Android 12 |
| CSC | G991BOWO4CVB9 |
| Build Date | 2022-03-7 |
| Changelist | 23695702 |
