Not sure about Sprint actually, I don't believe it's supported today but confirm with Meraki Support. I know there's AT&T, T-Mobile, BT, Telefonica, Telstra, Optus, Vodaphone and most recently Verizon. I've got a T-Mobile in my own because I only use it for my home lab and they had a $10/month plan for 2GB and they generally have pretty good coverage in my area.