Public Mobile uses 3G speed on it's regular plans but gives you the option to purchase a 4G data package if you'd like. 3G seems to work perfectly for me. I've watched videos, downloaded podcasts, uploaded photos, used GPS, and even FaceTimed using the 3G network with no issues at all. If you're a heavy data user or super techy, you might not like 3G, but it seems to work great for a regular user and I don't see the need to pay more for 4G.