If you have been waiting patiently for the release of Samsung's S20, or browsing through the settings of your iPhone 11 to check for the mysterious caller filter (yes, it's a real thing), you may have come across the term dual SIM or eSIM.
If you're not sure if eSIM stands for electronic SIM or "Embedded Subscriber Identification Module" (you guessed right, the latter), then we've covered the basics. Here's a handy response from infographic "What is an eSIM?"And "How does eSIM function?”.
infographic by: www.esim.net