Wesley's Tool-Box

LTE frequencies tend to be quite varied because it has to be either laid alongside or replace the existing 2G and 3G networks. Even so, Apple tries to support as much frequencies as possible because it will reduce the number of region-specific models. Unfortunately, iPhone 5S and 5C each sprawled to five different models, so people asked around whether their iPhones would work on another country's LTE network. I even wrote about iPhone 5S's LTE network compatibility last year, and it has the longest comment thread in this website.

This time around, though, the number of models were reduced to a much more manageable two for both iPhone 6 and 6 Plus. The massive 20-band support did the trick. The good news here is that, if you bought an unlocked iPhone 6 or 6 Plus anywhere in the world and come to Korea, the LTE will work with all three local carriers. Korea should get A1586 / A1524 models on sale in a couple of months, but A1549 / A1522 models often found in United States or Canada should work, too.

After I brought the A1524 iPhone 6 Plus from Japan to Korea, I put the SIM card from my 5S and turned it on. The device had no problems connecting to SK Telecom's LTE network right away. I've confirmed that the situation is the same when you're on KT's network, as well. It seems that the network no longer goes into 3G mode when it sees an unrecognized LTE device, which used to be the case when I brought the iPhone 5S from United States last year.


Meanwhile, the top speed for LTE data on iPhone 6 series was pushed to 150Mbps from 100Mbps of 5/5C/5S. The bleeding edge phones in Korea are always a step ahead - 150Mbps was possible when iPhone 5 came out and the recent models can do 225Mbps - but with low monthly data caps, they are little more than technology show-off right now.

In any case, I wanted to see how fast the iPhone 6 Plus can do LTE data in real life, so I ran a speed test app. As you can see here, it can go almost up to 100Mbps. Pretty good, but that's how fast an iPhone 5S could supposedly do, as well. Obviously, a side-by-side test was needed.

The biggest change in the iPhone 6 series is undoubtedly the physical size, and it is of interest to most of the people who are considering a purchase. I had the chance to compare an iPhone 5 with both an iPhone 6 and 6 Plus at an Apple Store and took this picture to give those of you who are upgrading within 2 years some ideas of scale.

Although the 4.7" iPhone 6 is certainly bigger than the 4.0" iPhone 5, it is not considerably so. When I held both in my hands, the 6 felt like a 5 with a case that's a bit thick around the sides. Because the 6 is also thinner (0.7mm) while adding only a slight bit of weight (17g), it doesn't feel too big or heavy, either. If you want to largely retain the portability that iPhone series provided, iPhone 6 carries on the theme somewhat okay.

As for the 5.5" iPhone 6 Plus, it feels like an another class of device, rather than being an iPhone. Observe the following picture.


iPhone 4S represents the general size of all the old iPhones going back to the 1st generation. iPhone 5S represents all the 5 series (5, 5C, 5S). These two classes of iPhones are not really all that different in dimensions. However, the iPhone 6 Plus is substantially large enough that it's something that's occupying a class between the old iPhones and the iPad mini. iPhone 6 Plus is to iPad mini what iPad mini is to iPad.

Over the past four years, I have bought all the iPhones that had been officially released in Korea on the first day of domestic availability, starting with iPhone 3GS. iPhone 5S is the first one that I didn't wait. Of all those phones, iPhone 4 is currently on leave (dad is using it), so I have 3GS, 4S, 5, and 5S for simultaneous performance testing.

This may be something a lot of people would be curious about and I hope to give you a good basis in considering an upgrade for your previous generation iPhones. Read on and let's get started.