One of Apple's biggest spiels about the iPhone XS and XS Max is their improved LTE performance. That's thanks to its overdue adoption of 4x4 MIMO technology. In theory, that should shut Samsung up over its claims of download superiority. But how does it perform in practice? Separate benchmarks apparently show how much the iPhone XS improved over its predecessor. Unfortunately, they also show how Qualcomm may still have a bargaining chip over its new enemy.