oppo network code
A33f *#3988691# A37f *#3988691# for f1s there are two codes, if one fails try another f1s *#3988691# f1s..*#69188692# A37.f1s ALL ....*#3988691# F1 *#3982591# F1+ *#3988012# R5 *#3988341251# OP FIND 5 *#392102191# OPPO JOY *#302121691# OPPO S7 *#39802121451# OPPO NEW..A57 all *#3980612565046691# now this is master code *#3988691#