9to5Mac:

A new study from OpenSignal published today looks into the cellular performance of the most popular iPhones going back to 2013. While there’s nothing too surprising in the findings, it does nail down exactly what average speeds each model sees, how much owners of older iPhones are missing out, how much iPhone cellular speeds have grown over the years, and a few other interesting details.

For those with an iPhone 5s, 6 or 6 Plus, the research shows that those models are capable of roughly half of the cellular speeds that the new iPhone XS and XS Max are.

I knew older iPhones were slower but half speed may be enough to convince my wife to upgrade her iPhone 6 Plus.