情报来源：
https://tinyurl.com/yd43s2oy
In taking the iPhone XS and iPhone XS Max apart, teardown expert iFixit has
discovered both models have an extra antenna. This not only enables support
for Cat 16 Gigabit LTE but appears to be the driver behind some jaw-dropping
real-world improvements to 4G performance.
拆解iPhone Xs and Xs Max后发现里面多了一个天线，所以它们可以支持CA 16
以及Gbps级的网络速度。
Measuring 4G speeds across US carriers AT&T, T-Mobile and Verizon, popular
Android and iOS signal testing app SpeedSmart has revealed both new iPhones
deliver massive gains of 2-3x compared to the iPhone X under the same test
conditions.
从对美国四大电信商的测试中，都发现速度比iphone X快了3倍
For heavy data users, this alone may be enough of a reason to upgrade. That
said, it may also be a reason to avoid the iPhone XR.
相对来说如果这是你想要买Xs的原因的话，这也是你不该买XR的原因
The appeal of the iPhone XR is it delivers most of the major features of the
iPhone XS and iPhone XS Max for a lot less money. But, if you dig deep into
the XR’s specifications, you’ll see that it compromises by using the same
Cat 12 LTE connectivity as the iPhone X. And we now know that’s a world
apart from its more expensive stablemates.
iPhone XR的天线跟iPhone X一样，只支援CA 12
Of course, the iPhone XR does have one equally appealing advantage (besides
cost) over the iPhone XS Max and, in particular, the iPhone XS and that’s
much better battery life.
但至少，iPHone XR电池撑的比较久
Consequently, while news of the flagship models’ 4G performance is very
welcome, it makes me wonder why Apple failed to release one new iPhone which
has it all…
原来网络速度是有差的～
果然有些功能还是不能完全下放给XR的