Otherwise, go to Settings, tap on Cellular or Mobile Data and select Add Cellular/Mobile Data Plan. You can then manually enter information provided by a carrier at the bottom of the screen.

Whether you're setting up your first phone or trying to transfer data from an old one, here's how to activate an eSIM on your iPhone 16.

Well, my iPhone updated when I connected it this evening. I just got to work, tapped the web browser and got this message:Could not activate cellular data ...

Enabling Allow Cellular Data Switching offered what seemed like a distinct improvement, providing more consistent coverage at the highest possible data rate without draining either 5GB pot fully.

While physical SIM cards have long been the most common to enable cellular services on an iPhone, eSIM technology is more convenient and future-proof. Short for embedded SIM, eSIM involves ...