I lost cellulare on my iPad

My iPad had problem with code of 1009 , I erased all of data and setting to install apps and .., after that I lost my cellular too on my iPad ,

DMVJR1BJF185 is my serial number and I tried to creat new Apple ID and .. But now I can't install any app and also I don't have cellular too.

Software is uptodated and also I did several times backup