Your cellular carrier is likely offering a larger data allowance for no extra charge during the coronavirus pandemic. Wirecutter has a guide on how to make sure you know what you’re getting.
Planning a European vacation? If you don’t want to pay through the nose for cellular connectivity, look into the Orange Holiday Europe SIM, which provides 3 GB of data (or 8 GB if you activate soon) for just $22.
Google's Project Fi phone service has become Google Fi, with official support for using the iPhone you bring to the plan. But the iPhone experience isn't the same as for Android phones using regular Google Fi. So for now, Google Fi is worthwhile only in select circumstances.
Planning a trip to the UK? After a family vacation there, Adam Engst has some advice for international travellers looking for an inexpensive way to get cellular data for their iPhones. He also suggests using Apple Pay for public transportation in London and recommends an inexpensive power adapter for charging devices.