5G Cellular. Cellular carriers are introducing two new spectrum bands – CBRS spectrum and millimeter wave spectrum – as 5G. The actual use of these spectrums is not yet technically 5G because the carriers aren’t yet using much of the 5G specifications. These two specific spectrum bands come with another warning in that they are only being used to produce faster outdoor broadband. Customers who live in places where they can receive the new frequencies, and who compute outdoors might see value in paying extra for the devices and the 5G data plans. Most people are not going to find any value in what these plans offer and should not get sucked into paying for something they can’t get or won’t use.
Cellphone manufacturers are already starting to build the CBRS spectrum into high-end phones. By next year there should be a 5G version of every major cellphone – at a premium price. Within a few years this will be built into every phone, but for now, expect to pay extra.
The question that users need to ask is if faster cellphone data is worth the extra hardware cost and worth the extra monthly fee that will be charged for 5G browsing. I’ve thought about the cellphone functions that would be improved with faster broadband and the only one I can come up with is faster downloads of movies or software. Faster broadband is not going to make web browsing any faster on a cellphone. Cellphones have been optimized for graphics, which is why you can scroll easily through a Google map or can flip easily between videos on social media. The trade-off for faster graphics is that cellphones aren’t good at other things. Cellphones crawl when trying to process non-cellular websites or when trying to handle spreadsheets. Faster broadband is not going to make these functions any faster, because the slowness comes from the intrinsic design of the cellphone operating software and can’t be improved with faster broadband.
I also think customers are going to face a huge challenge in getting a straight answer about when CBRS spectrum or millimeter wave spectrum will be available in their local neighborhood. The carriers are in full 5G marketing mode and are declaring whole metropolitan areas to have 5G even if that only means new spectrum is in a few neighborhoods.
Finally, beware that both of these spectrums only work outdoors. And that means on foot, not in cars. Millimeter wave spectrum is likely to always be a gimmick. Folks testing the spectrum today report that they can lose the connection simply by rotating their phone slightly or by putting their body in the path from the transmitter. CBRS spectrum will be much more well-behaved.
Laptops. Lenovo has already announced a 5G-capable laptop coming in 2020 and others will surely jump on the bandwagon soon. The big issue with laptops is also an issue with cellphones. It might be reasonable in an area with good CBRS spectrum coverage to get a 100 Mbps or faster cellular connection. This is going to tempt a user to use a laptopas if it was on a home broadband connection. However, this is still going to be cellular data supplied on a cellular data plan. Unless the carriers decide to lift data caps, a customer using a CBRS spectrum laptop might find themselves exhausting their monthly data cap in a day or two. It’s also worth repeating that these are outdoor spectrums, and so only students or others who regularly use computers outdoors a lot are going to find this spectrum potentially useful.
5G Hotspots. A 5G hotspot is one that broadcasts bandwidth in millimeter wave spectrum. Sprint is already marketing such a hot spot. This takes us back to the early days of WiFi when we needed a dongle to use WiFi since the spectrum wasn’t built into desktops or laptops. A 5G hotspot will have that same restriction. One of the primary reasons to consider a millimeer wave hotspot is security. It will be much harder to hack a millimter wave connection than a WiFi connection. But don’t select the millimeter wave hot spot for speed because a millimeter wave connection won’t be any faster than the WiFi 6 routers just hitting the market.
In future years, 5G hotspots might make sense as millimeter wave spectrum is built into more devices. One of the biggest advantages of indoor millimeter wave spectrum is to avoid some of the interference issues inherent in WiFi. I picture the ideal future indoor network to be millimeter wave spectrum used to provide bandwidth to devices like computers and TVs while WiFi 6 is used for everything else. There is likely to be an interesting battle coming in a few years between millimeter wave and WiFi 6 routers. WiFi already has a huge advantage in that battle since the WiFi technology will be included in a lot more devices. For now there won’t be many easy ways to use a 5G millimeter wave hotspot.