Here is.....g935f/d network solution after patch cert
 

First..flash firmware of feb..march or april patch.....
Then root your phone via z3xxx.(important please use root method only z3x)
Then repair imei nd patch cert
After patch cert
Do Reset frp/rec/rcc lock
Cz patch cert need custom kernel...
Enjoyyyyy my tested solution

where find custom kernel ?

kernel g930f plz ......