Vivo 1606 Imei Repair Process Method: Before You repair your Device IMEI Check the Software version and baseband version if the baseband version is unknown you first flash with latest flash file. After flash the base band is okay now check the imei is also okay.But Vivo 1606 after flash you loss your device imei like its null or invalid or Both imei same.
So first you download the downgrade flash file or update Zip then load it Sd card at least 4gb need. Then put it your mobile go to recovery mode and flash by Update by zip method.After Successfully update done, now do it by above mentioned Video process by UMT dongle.
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