BROM error 2005 (S_BROM_CMD_STARTCMD_FAIL) on MediaTek: why and what to do
BROM ERROR: S_BROM_CMD_STARTCMD_FAIL (2005) is a classic error when connecting a MediaTek phone. It is most often seen in SP Flash Tool, and similar text appears in service-tool logs. It means the phone did not accept the start command in BROM mode.
What happens on connect
- A powered-off phone with the keys held connects and enters BROM, the boot ROM mode.
- The tool sends a start command.
- If BROM answers, the DA (Download Agent) loads and work begins.
Error 2005 is a failure at step two: the phone did not answer as the tool expected.
Main causes
| Cause | How to tell | Fix |
|---|---|---|
| Protected BROM (SLA/DAA) | recent Helio G or Dimensity | a tool with bypass for the model |
| No driver | unknown device in Device Manager | install MediaTek VCOM |
| Wrong order | port flashes and vanishes | press Start, then connect |
| PreLoader, not BROM | port shows PreLoader USB VCOM | enter BROM with keys or test point |
| Cable, hub, port | error wanders | another cable, rear USB 2.0 |
Protected BROM is the main cause on new phones
From recent Helio and Dimensity chips, makers enable SLA and DAA protection. The phone only answers tools with a correctly signed DA or an Auth file. SP Flash Tool with a plain DA returns 2005 or similar. Service tools such as TSM Tool Pro, UnlockTool and Cheetah Tool Pro use their own methods and connect on the same models.
Step-by-step fix
- Confirm the chip from the model code.
- Install a fresh MediaTek VCOM, disabling signature enforcement if needed.
- Power the phone off fully.
- Launch the tool, pick the model and operation, press Start.
- Hold both volume keys and connect the cable.
- If it repeats on a new chip, use a service tool with model support instead of SP Flash Tool.
- If the keys do not enter BROM, use a test point.
BROM or PreLoader
If Device Manager shows MediaTek PreLoader USB VCOM, the phone started a normal boot instead of entering BROM. Some operations work over PreLoader, but many need BROM. Hold the keys until the MediaTek USB Port appears.
Real-world example
A Realme C33 was being connected as MediaTek and kept giving a BROM error. Checking the chip revealed Unisoc T612, which needs the SPD driver and a different mode. On a Tecno Spark 10 Pro (Helio G88) SP Flash Tool gave 2005 while a service tool with model support connected at once. Identify the chip first, then pick the tool.
Other similar errors
| Error | Meaning |
|---|---|
| S_BROM_DOWNLOAD_DA_FAIL | DA not accepted: protection or wrong DA |
| STATUS_SEC_AUTH_FILE_NEEDED | Auth file required: protected BROM |
| S_FT_ENABLE_DRAM_FAIL | memory init failed: wrong scatter or preloader |
| 4032 / 4008 | flashing faults: cable, driver, files |
If the error is on an old chip
On older MediaTek (MT65xx, MT67xx without protection), 2005 is almost always the driver, cable or order. Reinstall VCOM, disable signature enforcement, use a rear USB 2.0 port and connect right after pressing Download.
What not to do
- do not flash another preloader just to connect; it can brick the phone;
- do not hold the keys longer than the tool asks;
- do not work through a hub.
Glossary
- BROM — MediaTek boot ROM, the lowest service mode.
- DA — Download Agent, the loader the tool sends.
- SLA/DAA — BROM protection needing a signed DA or auth.
- PreLoader — first-stage bootloader on the phone.
Which tool fits
For MediaTek with protected BROM: TSM Tool Pro rental, UnlockTool rental, Cheetah Tool Pro rental. Check the model in the list before paying.
Bottom line
Error 2005 usually means a protected BROM, a missing driver or the wrong order. Check the chip, driver and port, and for new models use a service tool with model support instead of SP Flash Tool with a plain DA.
How to keep the data
Error 2005 itself does not touch data, but many operations after connecting wipe the user partition. If the customer needs data, read and back it up first. Save connection logs per MediaTek model so a repeat issue is solved in minutes.
Working efficiently
If you handle many budget MediaTek phones, keep a short note per model: which tool connected, whether a test point was needed, and the driver version. This turns a recurring 2005 into a two-minute job.
FAQ
What does error 2005 mean?
The tool could not start the handshake with the MediaTek boot ROM; the phone did not answer the start command.
Why does SP Flash Tool fail but a service tool works?
On new chips BROM is protected; service tools use their own bypass, SP Flash Tool with a plain DA cannot connect.
Do I need a test point?
On some models, yes, if the keys do not enter BROM.
Can another PC help?
Sometimes, if the USB controller or driver is the issue.
Which phones give 2005 most?
Modern Xiaomi, Realme, Oppo, Vivo, Tecno and Infinix on MediaTek with protected BROM.
Do I need a scatter file?
For SP Flash Tool flashing yes; service tools usually do not need one to connect.