You Can Use The Below Method For Upgrade BLU Diamond M D210 Android 6.0 /And If You Want To Hard Reset It By Flashing The Stock Rom/ In Case If You Are Using Any Custom Rom And Want Back To Stock Rom And Official Firmware Or Facing The Boot Loop Problem. This Method Is Also Useful For Sudden Death/Bricked/Not Power And Also After Flashing The Stock Rom IMEI Null or Unknown Baseband Problems Can Be Solve.
Download SP Flash Tool Newest SP Flash Tool is a very useful utility for fixing soft brick or boot loop cases, especially for the Media Tek devices. You could flash Stock or Custom ROMs of your choice.
Windows 10/Pro users: READ: How To Install MTK VCOM Driver On WINDOWS 10 (32 & 64 bits)
BLU Diamond M D210 Stock Rom Flashing With SP Flash Tool :-
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Next click on the “Scatter loading” button and locate the scatter text from the unzipped ROM earlier, as shown below:-
Now click the “Download” button and connect your device (in off state) to the PC or Laptop via USB Cable and immediately press Volume Up button momentarily, and your device will be detected accordingly and initiating the flashing process, as shown below:-
It will complete the flash process in a minute or so, and when it is complete and successful, you see the yellow full bar and a big check mark as shown below:-
Now, you can switch on your device.