DC-HSPA Cellular Standard Indicator I have recently picked up a Nexus 4, on a carrier with a good DC-HSPA network (3 in the UK), and I want to check out the speed on that network. However, I don't know whether my phone has even picked up the DC-HSPA network. My speedtests have so far shown around 12Mbps down and 2Mbps up (one of which was in central London), so I can assume I'm only on HSPA+ at the moment. 

I'd imagine DC would be roughly double that. The indicator next to the signal strength bar has only ever said H or 3G. Will it say something different when using DC? It's never even said H+, for that matter. Is it supposed to? Or is H just a blanket for all HSPA-related standards?
According to this Wikipedia entry, this is enhanced version of HSPA+.

Now, reading from the telephony source in JellyBean, depending if its GSM, between the two lines numbered 72 and 107, there is nothing in there that indicates, the automatic detection of the usage of DC-HSPA and is probably being treated as HSPA+ for now in the interim, so its very highly likely that it will show up as a 'H' or '3G'. 

And then again, that's dependent on the compile-time specifications used when the ROM was built, to elect to show '3G', 'H+' or even 'H' on the status bar.