I don’t know why anyone would think that they couldn’t use technology.
Demons are angelic beings. Fallen yes, but they were angels. Their rebellion against God indicates they aren’t the brightest bulbs in the angelic world. But they are thousands of years old, if not older. They speak multiple languages. They know scripture. In some cases they can tell or sense the future. And they have at least some supernatural abilities. They have the ability to possess a human body.
God may have placed some limits on what they can do.
Satan had to ask permission to harm Job. But I don’t know anybody who knows what those limits are.