iPad ipad air 2,failed activation

[drsimo1255]

dear friends,my ipad air 2 is a wifi only model(no sim card) after ios 11.2 update in the activation step in itunes it says could not activate,remove sim and insert it again or remove sim pin,and when i try to activate on wifi directly from the ipad it says the activation server could not be reached(over 2 days)
one more thing to note:the ipad was on 10.3.2 and when i tried to update it via itunes it said that the ipad is up to date(December 1st/2017) which is obviously not true ios 11.2 has already been published by then

 

[BugeyeSTI]

Restore on iTunes and setup as new.. You should only need a wifi connection to activate it.. Are you sure it’s a wifi only model?

 

[drsimo1255]

Restore on iTunes and setup as new.. You should only need a wifi connection to activate it.. Are you sure it’s a wifi only model?

tried reset /hard reset/dfu/ i believe the seller changed the motherboard that's why I'm getting this pt