A computer-implemented technique can include establishing, by a mobile computing device having one or more processors, a first cellular connection between the mobile computing device and a first cellular carrier associated with a mobile virtual network operator (MVNO), detecting, by the mobile computing device, a condition indicative of (i) a level of cellular activity via the first cellular connection below an inactivity threshold and (ii) an available second cellular connection with a different second cellular carrier associated with the MVNO, and in response to detecting the condition: (a) terminating, by the mobile computing device, the first cellular connection, and (b) initiating, by the mobile computing device, the second cellular connection with the second cellular carrier associated with the MVNO.