Convert your IMEI to OnePlus FactoryMode (EngineeringMode) unlock code
How-to
content_copy
To get your IMEI 1
Please dial*#06#
and you'll get IMEI info. Long-press IMEI 1 to copy it.
content_paste
To unlock FactoryMode
Please dial*#*#5646#*#*
. When the screen to scan comes up, go back and enter the converted code in the field.
done
To open unlocked FactoryMode
Please dial*#36446337#
or *#808#
.