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Everything you need to know about 4G | battery wiki

You’ve probably heard a lot about 4G of late, with blisteringly fast download speeds set to change the way we use our mobiles. Some handsets already on sale are being classified as 4G, but are they worth checking out? Exactly how much faster is it than 3G? And when will we be seeing it rolled out completely in the UK?

We’ve spoken to industry experts for the full lowdown on everything you need to know about 4G, and it’s a mighty exciting prospect, not just for those heavily into their phones, but for those in rural areas in need of some decent broadband. So no matter if you’re a technophile or technophobe, read on to find out just what it means for you after the break.

What is 4G?

The first thing to note is there’s some confusion over what actually classifies as 4G. (Yes, we know, not like technology companies to make things unnecessarily complicated.) Current 3G networks generally support 7.2Mbps HSDPA (high speed downlink packet access) peak download speed, but that’s in the process of being upgraded to HSPA+, giving peak download speeds of 21.6Mbps.
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“HSPA+ has interference cancellation, making it great for weak signal areas,” says Phil Sheppard, director of network strategy at Three UK, so it’ll help spread broadband to areas that are traditionally weak. Dongles that use HSPA+, such as the Huawei E367, on sale now, use an external aerial, that also helps with reception.

But HSPA+ isn’t true 4G, even though some companies might refer to it as. “HSPA+ is a subset of 4G, but it’s built on the 3G network,” says Jonathan Morris, editor of What Mobile magazine. “Three UK is rolling out HSPA+ now, with devices such as the Huawei.” Vodafone also has HSPA+ in the network, so phones like the Samsung Galaxy S2 can take advantage of the extra speed, though a spokesperson would not state where in the country it is active.

Now things get even more complicated, but bear with us. There’s another strand of HSPA+ called dual carrier, which can achieve 42Mbps peak download speeds. (3G will also be going strong for years yet, narrowing the gap between it and 4G.) “We should be rolling our dual carrier next year,” says Sheppard, “but the story after that is all about LTE.”
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LTE is the real deal. While HSPA+ and dual carrier might be referred to as 4G, especially in the US, LTE comes packing peak download speeds of about 150-160Mbps. Obviously this is a theoretical maximum, but according to Sheppard, the average speed will move from about 1.7Mbps at the moment to between 5 and 10Mbps. Now that’s a difference you’re sure to notice.

What’ll it be like to use?

As an idea, at 50Mbps you can download a gigabyte in about four minutes, so this is the biggest change to internet use since broadband did away with dial-up modems.

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