Instructions to get IMEI number for free on Oppo devices

Oppo 3005 Oppo 3005
Oppo R1C Oppo R1C
Oppo 3000 Oppo 3000
Oppo A51 Oppo A51
Oppo Mirror 5 Lite Oppo Mirror 5 Lite
Oppo R7 Plus High Version Oppo R7 Plus High Version
Oppo F1 ICC WT20 Oppo F1 ICC WT20
Oppo R9 Oppo R9
Oppo A37 Octa Core Oppo A37 Octa Core
Oppo A59S Oppo A59S
Oppo A39 Oppo A39
Oppo A77 SD625 Oppo A77 SD625
Oppo R9S Pro Oppo R9S Pro
Oppo A79 Oppo A79
Oppo A75 Oppo A75
Oppo A75s Oppo A75s
Oppo A73 Oppo A73
Oppo A85 Oppo A85
Oppo R15 Dream Mirror Oppo R15 Dream Mirror
Oppo A83 Pro Oppo A83 Pro