Note: After selecting a patched DA, if you still see "status ext ram exception patched," the patched DA itself is corrupted or incompatible. Try another version.
To understand the fix, you must understand the terminology:
In simple terms: The SP Flash Tool is trying to access the device's memory using an old method that your phone’s security firmware is blocking.
Note: This error is often seen on clone/cheap devices with fake RAM sizes, or after flashing an incompatible preloader from another model.
STATUS_EXT_RAM_EXCEPTION (0xC0050005) in SP Flash Tool primarily indicates that the Download Agent (DA)
failed to initialize the device's external RAM (DRAM). This usually occurs because the tool is attempting to use a firmware or DA that is incompatible with the specific hardware variant of the phone. 🔍 Core Causes Firmware Mismatch:
You are likely trying to flash a ROM designed for a different model or a different hardware revision. Incompatible Download Agent (DA): The default MTK_AllInOne_DA.bin sp flash tool error status ext ram exception patched
may not support your specific RAM chip (e.g., Samsung vs. Micron). Security Patches:
Modern devices with updated security protocols often block standard flashing attempts, requiring an Auth Bypass Hardware Issues:
In rare cases, this error can signal that the EMMC or RAM has reached "end of life" and is physically failing. ✅ Recommended Fixes Verify Firmware Compatibility
Ensure the ROM matches your device’s exact model name (e.g., differentiate between "Elephone M3" and "Elephone M3A").
Check the device codename (e.g., "Dandelion" for Redmi 9A vs. 10A) as flashing across similar models can trigger this error. Use a Custom Download Agent (DA) file (e.g., DA_6765_6785...bin
) specifically for your chipset, often available on technical forums like Perform an Auth Bypass MTK Auth Bypass Tool Note: After selecting a patched DA, if you
(like MTK Bypass REV 1.0) before clicking "Download" in SP Flash Tool. Connection in SP Flash Tool to and match the COM port assigned by the bypass tool. Try Different Tool Versions For specific chipsets like MT6765/62, versions like are often more stable than the latest v6.x releases. Connection Stability Volume Up + Volume Down buttons while connecting the USB cable.
Use a high-quality USB cable and a port directly on the motherboard (avoid USB hubs). Quick Tip: If the device was previously formatted, try unchecking the
file in the list before flashing to see if it allows the process to start. To give you the most accurate solution, could you tell me: What is the exact model of your phone? version of SP Flash Tool are you currently using? Did this error happen after you tried to the device?
Physical damage: A cracked RAM chip, loose ball grid array (BGA) solder joint under the RAM, or a shorted capacitor in the RAM power rail.
Since the error explicitly mentions "patched", the most effective fix involves using a compatible patched DA or modifying the flashing process.
If you are trying to flash a MediaTek (MTK) Android device and have encountered the red error bar stating "Status Ext RAM Exception Patched", you are not alone. This is a common security roadblock introduced in newer MTK hardware and firmware. To understand the fix, you must understand the terminology:
This guide explains why this happens and provides step-by-step solutions to bypass the error and successfully flash your device.
If you see "Status Ext RAM Exception Patched":
This error is one of the more frustrating roadblocks in firmware flashing, as it indicates a hardware-level handshake failure before the software even begins to write.
Before applying fixes, identify the root cause from this list:
| Cause | Explanation | |-------|-------------| | Wrong DA file | The Download Agent does not match the device’s platform (MT6572, MT6580, MT6739, MT6765, etc.). | | Corrupted preloader | The preloader partition on the device is damaged, causing a mismatch when initializing DRAM. | | Battery or power issue | Low battery or unstable USB power leads to DRAM initialization failure. | | Scatter file mismatch | Using a scatter file from a different device model or different RAM configuration. | | Patched DA incompatibility | Custom DA files (e.g., "DA_SLA_ByPass.bin") work for some boards but crash on others. | | Hardware damage | Physical defect in the DRAM chip (less common but possible). | | SP Flash Tool version | Very old or very new versions may have bugs specific to certain chipsets. |