A.I. dies and makes all phones on Earth ring in unison at the end [closed]

Can you help me identify the movie where a computer, an artificial intelligence, dies and makes all phones on Earth ring in unison at the end?

Here's a list of memories I have from this movie:

• Computer falls in love with computer scientist's girlfriend
• Computer competes for love of girl
• Computer scientist walks down stairs with girlfriend held off the ground in his arms trying to hide her escape from the computer, but the computer senses the weight difference from the sound and detects what is happening
• Computer makes a love song and performs it for the girl
• Computer's love song shows lack of understanding love, and comes off sounding very technical, for lack of better way of describing it
• Computer eventually commits suicide by making an electric surge hit itself
• Computer makes all phones in the world ring in unison to signal its death

I may be off on some of these points. In fact the phones all ringing in unison might be from a different movie, such as The Lawnmower Man.