eSIMs are among the most valuable yet often perplexing resources a traveler can utilize. We’ve [discussed eSIMs](https://foxnomad.com/2020/02/20/what-are-esims-easy-mobile-internet-for-travel/) previously, and the video above answers many of your primary questions. Check out [it here first](https://youtu.be/frluSjMwgyw?si=7rOhCF_MZucpt6RR) before exploring the quick responses below.
**Will You Receive A Phone Number?**
This is contingent upon the [eSIM service provider](https://foxnomad.com/2023/12/21/how-to-use-esims-when-traveling/) in the area, rather than the eSIM technology itself. Typically, for travel eSIMs, the answer is no, as most online retailers such as Airalo, BNEsim, and Holyfly lack the necessary permits for phone numbers (and SMS), offering only data instead.
**What About SMS?**
Yes, that’s accurate.
**How Can I Make Calls?**
You can use Facetime, Whatsapp, Signal, or any other [Internet-based calling application](https://foxnomad.com/2016/11/10/5-reasons-use-airplane-mode-even-youre-not-flying/). Otherwise, you won’t be able to make calls with a travel eSIM that doesn’t provide a phone number. You may visit a local store or kiosk at the airport to set up a temporary mobile account (which will likely still use an eSIM) but should obtain a phone number rather than data only. Alternatively, you can configure your home mobile plan to feature international roaming for use while traveling.
**Is It Possible To Use Multiple eSIMs Simultaneously?**
Nearly all eSIM-compatible devices allow for the simultaneous use of two eSIMs. (You can install even more.) This would enable you to utilize your home eSIM/service for calls and the local eSIM for data. Just ensure you’re using the correct eSIM for each purpose. To be safe, deactivate your home eSIM when it’s not in use.
**What Becomes Of Your Home eSIM?**
Nothing. Each new eSIM operates independently, much like physical SIM cards.
**eSIM Overview**
In summary, eSIMs simplify staying connected while on the go. They can be bought in advance and activated later if necessary, providing data access worldwide. Regional eSIMs are also available, all of which can be obtained directly from your phone. However, for travelers to Turkey, [you’ll need to complete this step first](https://foxnomad.com/2025/07/24/what-you-need-to-know-about-turkeys-esim-ban/).