On Tuesday, Apple is predicted to launch its first iPhone models that support 5G networks.

These iPhones will have the ability to faucet into quicker next-generation networks from Verizon, AT&T and T-Mobile for quicker obtain speeds and stronger wi-fi connections.

In the US, the carriers are nonetheless constructing their 5G networks. When the 5G iPhone comes out, relying on what bands it helps, some shoppers in search of a sea change when it comes to wi-fi speeds might have to attend till their provider catches up with the telephone’s capabilities.

5G speeds might be quicker, however not essentially quick sufficient to be a motive for upgrading till U.S. carriers end constructing their networks. To date, 5G obtain speeds are simply 1.8 occasions quicker than 4G LTE speeds in the US, in keeping with information from Opensignal, a agency that tracks wi-fi community speeds around the globe.

However in different nations with 5G networks that use what’s referred to as “mid band frequency,” speeds are 5 occasions as quick as LTE, in keeping with Opensignal.

5G isn’t a monolith. There are three completely different variations of 5G connections, which every use completely different radio frequencies and include their very own benefits and completely different speeds. In the end, carriers are aiming to construct out all three completely different sorts of 5G within the subsequent two or three years, however thus far, no U.S. provider has but constructed all three completely different sorts of 5G into their business networks.

“Within the U.S., while you see millimeter wave, and also you see low-band, that is not 5G, that is simply two elements of 5G,” mentioned Ian Fogg, VP of research at Opensignal. “5G may have mid band too. What we’re seeing within the US proper now’s model .9 or model 1.0, it may enhance quite a bit.”

That is loads of technical jargon to dig by means of, so let’s break down every sort of 5G to make it so simple as attainable.

Excessive band, also called millimeter wave, mmWave or extremely wideband

That is the quickest sort of 5G, however it has limitations primarily based on the wi-fi frequency it makes use of. It might’t journey so far as different waves, which implies that carriers have to construct extra stations to distribute it and it’ll primarily be geared toward dense, city areas. Verizon has wager huge on millimeter wave, which it calls extremely wideband, though it’s at present solely obtainable in 36 cities, in keeping with its web site.

The benefit is that the max speeds from a millimeter wave connection can high 1 gigabit per second, in keeping with carriers like Verizon. That can blow away present 4G LTE networks, probably permitting customers to obtain films in seconds.

AT&T and T-Cellular are additionally at present constructing millimeter wave into their networks in main cities. To date, millimeter wave is a U.S.-based phenomenon, Fogg mentioned, and different nations have not launched commercially obtainable networks, solely trials, though that would change if the brand new iPhones helps millimeter wave.

Mid band

Mid band is the commonest sort of 5G around the globe, however it has not but been broadly constructed out in the US as a result of carriers want the FCC to promote rights to particular wavelengths they should function the community. Auctions are scheduled for later this 12 months and subsequent 12 months. Fogg mentioned it’s the “Goldilocks band” for 5G that may steadiness distance it might probably cowl with considerably larger speeds that U.S. shoppers will discover.

In South Korea, over 10% of wi-fi subscribers are at present on 5G, which implies mid band within the nation. Mid-band speeds can vary between 100 to 300 Mbps, which is corresponding to a cable broadband connection. In the US, T-Cellular launched commercially obtainable mid-band 5G in some cities and states in September, utilizing rights to wavelengths it bought from the Dash merger.

Low band

That is what commercials from U.S. carriers boasting about their “nationwide 5G” protection are referring to. It is quicker than 4G networks, however it’s the slowest sort of 5G. Its greatest benefit is that it supplies the very best vary, and within the U.S., the wavelengths wanted to function it are already obtainable to carriers.

At the moment, AT&T and T-Cellular provide low band 5G in a lot of different regions and states. In T-Cellular’s case, it’s already promoting that it’s available in all 50 states. However customers will see the least enchancment when it comes to velocity with low-band 5G, and it is probably not price upgrading to a 5G telephone if solely low band is on the market. On common, the speeds will not really feel a lot quicker than the 4G connection you are used to.

In the end, carriers will provide all three sorts of 5G, and smartphones will have the ability to connect with a number of bands for higher efficiency.

“We’re actually proper initially of the 5G period. We’re seeing completely different U.S. carriers lead with one a part of the 5G service,” Fogg mentioned.

Finally, carriers will provide service utilizing millimeter wave in city areas to offer very excessive speeds, mid band to cowl nearly all of space with good speeds and good protection, and low band to succeed in massive swaths of space.

An occasion just like the 5G iPhone launch might additionally spur a wave of bulletins from carriers around the globe that they’re increasing or turning on 5G networks. In nations just like the U.S. and Japan the place a big a part of the inhabitants makes use of iPhones, having 5G iPhones on sale might construct a crucial mass of 5G customers that immediate carriers to speed up their community plans.