activation error

I have iphone 6s 128 gb on ios 12.1 and i reset it to give it to my wife since i made that i could not be able to activate it

and it said can not be activated could not connect to server

i tried more than sim and withoud sim and using wifi and the same problem

and i tried to axtivate using itunes and the same problem tries to install ios 12 again and also. No hope