The internet is complex. Numbers do not tell the whole story. If you look beyond numbers, you'll be surprised what matters in the real world.
30 Mbit is not currently needed for a phone. In fact, if you're going at a consistent 30mbit, you'll reach the average data cap (2GB) in about 10 minutes

.
General web browsing, checking email, watching videos, downloading photos, playing games, getting sports scores, using Siri can all be done comfortably at the OP's speeds. In fact, if you look at real world tests higher numbers do not always equate to a better experience.
I'll use TMobile as an example. Studies have shown that Verizon's 3G network beats TMobile's much faster 3G network (and others) on a consistent basis, even when TMobile has the lower ping and higher data throughput. I'm not saying TMobile doesn't win some of the time, but overall, Verizon's real world experience is more consistent than TMobile's at lower speeds and higher ping. What's also shocking is how close Verizon's 3G experience is to their 4G experience.
Take the 4G vs 4G numbers with a grain of salt, as they don't elaborate on what "type" of 4G they're testing.
If you hover over the pictures, the pic name shows the location. The top left is Chicago:
Source:
http://www.pcworld.com/article/255068/3g_4g_performance_map_speeds_from_everywhere_we_tested.html