Encountering a dead boot or no boot problem with your OPPO F21s Pro 5G (CPH2455) can be perplexing. However, there’s a solution – flashing the Full Dump File. In this guide, we’ll provide comprehensive instructions on how to effectively address this issue.
Understanding the Process: It’s crucial to understand that directly flashing the Full Dump File onto the OPPO F21s Pro 5G (CPH2455) via a USB connection isn’t viable. Instead, you’ll need to utilize a Mipi Tester or Easy JTAG box to connect to the UFS IC for flashing the file using a computer.
Conclusion: By following these outlined steps and utilizing appropriate tools such as a Mipi Tester or Easy JTAG box, you can effectively flash the Full Dump File to rectify dead boot or no boot issues on your OPPO F21s Pro 5G (CPH2455). Exercise caution throughout the process and seek professional assistance if required.
| Model Settings | |
|---|---|
| Interface | UFS |
| Gear | HS-G2A |
| VCC | 2.6V |
| VCCQ | 1.8V |
| Connected | Reading information |
| Manufacturer | SKhynix |
| Product Name | H9HQ15AFAMBDAR |
| Serial Number | ??? |
| OEM ID | 01AD |
| [NAME] | ROW SZ | PageSz | PageCount |
|---|---|---|---|
| [Unit0] | 116GB | 4096 | 30577664 |
| [BootA] | 8MB | 4096 | 2048 |
| [BootB] | 8MB | 4096 | 2048 |
| [Unit3] | 32MB | 4096 | 8192 |
| [Unit4] | 1GB | 4096 | 505856 |
| [Unit5] | 556MB | 4096 | 142336 |
| [RPMB] | 16MB | 256 | 65536 |
| [Attribute] | WR:4B | RD:4B | |
| [Descriptor] | WR:256B | RD:256B |
| Backup security | Partitions |
|---|---|
| Reading | LUN 0 Part0 PrimaryGPT 0.bin |
| Reading | LUN 0 Part2 persist.bin |
| Reading | LUN 0 Part17 BackupGPT 0.bin |
| Reading | LUN 1 Part0 PrimaryGPT 1.bin |
| Reading | LUN 1 Part4 BackupGPT 1.bin |
| Reading | LUN 2 Part0 PrimaryGPT 2.bin |
| Reading | LUN 2 Part4 BackupGPT 2.bin |
| Reading | LUN 3 Part0 PrimaryGPT 3.bin |
| Reading | LUN 3 Part9 BackupGPT 3.bin |
| Reading | LUN 4 Part0 PrimaryGPT 4.bin |
| Reading | LUN 4 Part4 modem a.bin |
| Reading | LUN 4 Part25 modem b.bin |
| Reading | LUN 4 Part48 modemdump.bin |
| Reading | LUN 4 Part59 BackupGPT 4.bin |
| Reading | LUN 5 Part0 PrimaryGPT 5.bin |
| Reading | LUN 5 Part4 modemst1.bin |
| Reading | LUN 5 Part5 modemst2.bin |
| Reading | LUN 5 Part6 fsg.bin |
| Reading | LUN 5 Part21 BackupGPT 5.bin |
| Reading | Attribute |
| Reading | Descriptor |
| Backups | SKhynix H9HQ15AFAMBDAR |
| Read (16GB) | Finished |
|---|---|
| Reading LUN 0 16GB.bin | Done |
| Reading LUN 1.bin | Done |
| Reading LUN 2.bin | Done |
| Reading LUN 3.bin | Done |
| Reading LUN 4.bin | Done |
| Reading LUN 5.bin | Done |
Steps to Flash the Full Dump File:
- Gather Necessary Tools: Assemble essential tools including a Mipi Tester or Easy JTAG box, a computer, and the Full Dump File.
- Extract the Full Dump File: Download and extract the Full Dump File onto your computer for easy access.
- Connect the Mipi Tester or Easy JTAG Box: Disassemble your OPPO F21s Pro 5G (CPH2455) carefully to access the UFS IC. Connect the Mipi Tester or Easy JTAG box to the UFS IC following provided instructions.
- Launch Flashing Software: Open the compatible flashing software (e.g., Easy JTAG Plus) on your computer.
- Initiate Flashing Process: Within the software interface, select the option to flash the Full Dump File and follow on-screen instructions.
- Wait for Completion: Allow the flashing process adequate time to complete without interruption.
- Reassemble the Device: Once flashing is successful, cautiously reassemble your OPPO F21s Pro 5G (CPH2455).
- Test the Device: Power on your device and verify resolution of the dead boot issue.
