It's Over (2020)

The temperature of the earth's core has been rising rapidly over the past nine months, and the earth is crumbling as a result. With only five minutes to go until the end of the world, Alice and Bex find themselves separated in an unfamiliar location. Alice, bleeding out from a fatal gunshot wound to the gut, decides to use her remaining time and energy to break up with Bex over walkie-talkie.