Apple's 2018 iPhone models – especially the XS line – offered the first significant promise to 4G data rates in several year, according to research firm OpenSignal.
XS and XS Max are nearly 26 percent faster than all iPhones released between 201
Max especially put Apple's best foot forward with speeds up to 21.7 megabits per second. Standard XS rated others at 20.5mbps, but XR was actually slower than X at 17.6mbps versus 18.5, respectively. Because it uses 2×2 MIMO instead of 4×4, XR is not capable of the same speeds as XS.
Bandwidth is said to have been largely stagnant between the iPhone 6 and X. This may have reduced people's interest in upgrading to new iPhones, speculating OpenSignal.
Although the first 5G phones and networks roll out, Apple is not expected to adopt technology until 2020. What coverage is limited, and Apple's preferred modem manufacturer, Intel, is unlikely to have a 5G chip ready next year.
Apple has often been criticized for being slow to adopt new mobile standards. The original 2007 iPhone was 2G at a time 3G was making waves, and the company did not adopt 4G to the 2012 iPhone 5.