How Fast is iPhone 4G LTE?

In the Macworld offices in downtown San Francisco we were able to measure download speeds of 20Mbps on AT&T and 23Mbps on Verizon. Upload speeds were 17Mbps (AT&T) and 14MBps (Verizon). Compare this to the 4Mbps downloads and 0.3MBps uploads I saw on AT&T’s older GSM network. Downloads that are five times faster? Not bad.

How’s that stack up to the UK? On the iPhone 5 with the DC-HSDPA network we managed to get a 13MB download connection with regular download speeds between 7 and 10MBs and between 2 and 5 MBPs upload. All on the Three network.

So with a decent connection in the UK you don’t need to cry too much about not having 4G just yet. But speed isn’t the best part of L TE. It won’t be just faster; it will remain faster, in a consistent and reliable fashion, a greater portion of the time than 3G. The iPhone 5can access all of the following kinds of networks:

• EV-DO = 3.1Mbit/s
• HSPA 7.2 = 7.2Mbit/s
• HSPA+ = 21Mbit/s
• DC-HSDPA = 42Mbp/s
• LTE 4G = 73Mbp/s

Where you might have coverage gaps, high congestion with other users in the same mobile cell in a city (or even a small town with few base stations), or a huge variation in speed, it’s likely that L TE will smooth all that out. Carriers will have a much larger pool of bandwidth that the technology lets them to divide it up more precisely among users trying to gain access.

How much faster? This chart from Apple shows proprotionally how much faster browsing you can
expect on a new iPhone. The HSPA is an iPhone 4S and previous models. The HSPA+, DC-HSDPA and
LTE speeds are all now available to iPhone 5 owners (depending on your carrier support)
Source : The Complete Guide to the iPhone 5