@Darafsh was trying to edit Wikipedia using the android app but he couldn't save the edit, he tried to log out and login but that was unsuccessful but once he enabled proxy, he was able to login and edit.
People can reach wikipedia.org on that ISP at the same time. Maybe the Iranian government accidentally block something for the mobile service and/or the mobile tries to connect to Wikimedia commons (and since it's blocked) everything fails (which I guess it shouldn't in such cases).
It would be great to see how many users are affected via analyzing traffic.