The v480 trace mode provides specific hex error codes that generic error messages hide.
| Code | Meaning | v480 Trace Action |
|------|---------|-------------------|
| 0x1A20 | Preloader not responding | Trace shows which USB interrupt was missed. |
| 0x1A30 | SBC (Secure Boot Challenge) fail | v480 logs the nonce mismatch. |
| 0xFC00 | NAND bad block detected | Trace shows physical block address. |
| 0xFFFF | DA version mismatch | v480 reports expected vs actual DA hash. | smart phone flash tool runtime trace mode v480
When a phone shows “flash error 0xFC00”, runtime trace mode v480 will list the bad block Logical Block Address (LBA). You can then manually edit the scatter file to skip those LBAs – something impossible in normal flash mode. The v480 trace mode provides specific hex error
If a device has triggered ARB, downgrading is impossible. However, in Runtime Trace mode, you can see the (ARB) Index: 2, Current: 3 error. Workaround: Use mtkclient (external tool) in parallel with v480 trace to force a preloader handshake ignoring ARB. | | 0xFC00 | NAND bad block detected