3G: A Killer Connection 2013

3G is a 2013 Indian horror-thriller movie directed by Shantanu and Sheershak. The film follows Sam and Sheena, newlyweds who purchase a second-hand cell phone that has been possessed by an evil spirit. The spirit slowly takes control of their lives and threatens to kill them if they don't do as it says. After experiencing strange occurrences, the couple discovers that the cell phone is actually haunted by a vengeful spirit from the past. To save themselves, they must use the 3G network to communicate with the ghost and find out why it is haunting them. With the help of a spiritual guru, they eventually exorcise the spirit and free themselves from its terror. In the end, they learn that the spirit was seeking revenge for being wrongfully killed in the past. Through this experience, the couple comes closer together and learns how to stay strong in the face of adversity.