5G is coming: what you need to know

Simply put, all that "5G" really means is that it's the fifth generation wireless technology, following, well, 4G. Those two-character names have basically become the stand-ins for the actual technologies implemented with those standards, like CDMA, GSM, HSPA, UMTS, and, of course, LTE. In a nutshell, 5G involves utilizing higher frequency bands in order to support faster speeds, less latency, and more devices.

Naturally, the biggest advertised benefit of 5G is the speed. After all, a theoretical maximum speed of 20 Gbps is drool-worthy, especially when you compare that to 4G's theoretical 2 Gbps (at least with a Qualcomm Snapdragon X24 LTE modem). Even if 5G just ends up with a real-world 10 Gbps range, that's still a huge leap forward and on par with the newest Wi-Fi 802.11ax specification.

But speed isn't 5G's only benefit. Low-latency communication is also a key factor with standards aiming for something as low as 1 ms. This is going to be critical not just for things like gaming but also for IoT and smart cars. 5G can also support more devices connected at once, again essential for the explosion of connected devices and vehicles, and with network slicing, different devices can have their own portion of the wireless spectrum which may be faster or slower, depending on their needs.

The high-speed, low-latency features of 5G will naturally make consumers ask if this is the future of home broadband. The answers, admittedly, is "yes and no". Wi-Fi is a separate standard which is advancing at a separate pace and is best used for different use cases. At the moment, the fastest Wi-Fi spec, 802.11ax, is just as fast as the measured 5G speed, around 10 Gbps. And considering its range and stability limitations, 5G is far from replacing Wi-Fi for now. You wouldn't want your connection to be disrupted just because the weather changed.

As for broadband, in a way, Verizon's much-advertised 5G rollout is technically broadband, not cellular, 5G and not everyone agrees it even qualifies as 5G. Network operators simply have to driver fiber optic cables to cell sites and then let small cell 5G radios relay the signal to the subscriber's home. There, special equipment would then transform 5G into Wi-Fi signals that anyone can connect to like normal, at least until all devices can use 5G directly. That said, such a system would still be subject to the same limitations above.

In due time 5G can eventually replace Wi-Fi in use cases where it would be more efficient. IoT appliances that don't need to be constantly connected to the Internet can use 5G instead while smart cities and smart cars could benefit from the low-latency the network provides. Again, all in due time.

Definitely not in 2019. Or rather, the wave will start with a few ripples that only a lucky few will be able to experience, much less take full advantage of. As mentioned, Verizon's 5G rollout last October is still in question. AT&T plans on launching a "true mobile" 5G service before the year is over, which happens in less than 25 days. Both T-Mobile and Sprint aren't planning on following suit until next year. And that's not yet considering the 5G-compatible smartphones you'll need.

And that's just in the US alone. Other markets, like Australia, Canada, China, and the UK are all doing their own independent work on supporting and launching 5G networks and each has their own pace. Considering how long it took 4G to be as widespread as it is now, don't expect massive 5G adoption until at least 2020. Perhaps in time for an iPhone "5G".