Flashing Guide With Normal USB Cable And Using Windows 10_32Bit
Step1.
Switch Off Mobile, Press Vol Up + Power Key For Fastboot Mode
Step2.
then open your comd prmt and type this command
[ fastboot oem reboot-edl ]
Now Mobile Will off And Will Show 9008 Port In Device Manager
Official Firmware
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Os: 6.0.1
P1a42_M_S285_160525_ROW_QPST.rar
Source: lenovo-forums