Hola amigos espero les sirva, solucion serial para redmi 9a via UMT Dongle.
1)Primero solo Format NVDATA/NVRAM.
You must be registered for see element.
Operation : Format NVRAM/NVDATA
Hold VOL UP + DOWN and connect USB Cable.
Some phone may have different key combination for BROM mode.
Waiting for device in BROM mode...
Port: COM63
Port Name: MediaTek USB Port (COM63)
Path: \\?\usb#vid_0e8d&pid_0003#5&8635bca&0&2#{86e0d1e0-8089-11d0-9ce4-08003e301f73}
Chipset: 0x0766, [MT6765]
Hardware Info: 0x8A00, 0xCA00, 0x00
SecureBoot: True
SLA: True
DA Auth: True
Disabling WatchDog...
- Success
Sending Payload data...
- Payload sent
Initiating Control Transfer...
- Done
Waiting for result...
- Result: 0xA1A2A3A4
Disable Auth Success
Waiting for Phone in Flash Mode...
Connect Power Off phone...
1)Primero solo Format NVDATA/NVRAM.
You must be registered for see element.
Operation : Format NVRAM/NVDATA
Hold VOL UP + DOWN and connect USB Cable.
Some phone may have different key combination for BROM mode.
Waiting for device in BROM mode...
Port: COM63
Port Name: MediaTek USB Port (COM63)
Path: \\?\usb#vid_0e8d&pid_0003#5&8635bca&0&2#{86e0d1e0-8089-11d0-9ce4-08003e301f73}
Chipset: 0x0766, [MT6765]
Hardware Info: 0x8A00, 0xCA00, 0x00
SecureBoot: True
SLA: True
DA Auth: True
Disabling WatchDog...
- Success
Sending Payload data...
- Payload sent
Initiating Control Transfer...
- Done
Waiting for result...
- Result: 0xA1A2A3A4
Disable Auth Success
Waiting for Phone in Flash Mode...
Connect Power Off phone...
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