Esim

It is when you roam with your phone across Europe that you realise how much data an iPhone gets through. In the space of a week I burned through almost 3 gigabytes and 7 more gigabytes before controlling which apps could use data. At the same time I reset the data counters and looked at the option of using dual esims at once. With the iPhone it is possible to have one sim active for your normal phone use, and a second sim that can be used for data while roaming.

A growing number of mobile phones are eSIM compatible. As a result by simply turning on a phone, and selecting the eSIM option you could make a spare phone your primary phone. When I activated my current phone I chose to use an eSIM, rather than a physical sim. Whilst this is fun it does have one draw back. If you swap phones every so often you need to shift the eSIM from one device to another with less ease than switching nano sims.