Pulse 3 (2008) on Netflix

Plot summary

Cities lie empty seven years into an invasion that killed billions through a plague carried by the Internet, spread by ghosts that had haunted humanity twice before. The survivors live on the outskirts in refugee camps, without any technology, and regard the old machines as forbidden. Justine, sixteen, dreams of a life beyond the camp. In the city she finds a laptop that still works and opens it. The stranger who is waiting online asks to meet her, but only in Houston, the city her people fled. Justine sets out from the camp to cross the empty country and return there.