iPad 2 activation failed
I am not able to use my iPad Model: iPad 2 Version: iOS 9.3.5 because after last power on(I use rarely the iPad), without SIM and then with only wifi, it try to activate itself and receive the following message(translated from Italian): 'it is not possible to activate the iPad because the activation server is not available at the moment. To activate it, try to connect iPad with iTunes or retry by some minutes. If problem persist contact Apple support.' I tried suggestions without success. I changed also my apple id password and tried to connect to my iCloud but problem persist.
Thank you for your help
iPad 2, 9