Dual SIM abroad: receive calls on your number while using an eSIM for internet

One of the biggest dilemmas for travelers is what happens to their usual phone number when they activate an eSIM for internet. Many people worry that once they start using a local data plan, they will be completely cut off from their contacts back home or miss important calls. Fortunately, the Dual SIM technology on modern phones is designed specifically to solve this problem in a smart way.

Here is how this system works and how you can stay connected on both plans at the same time.

How Dual SIM works with an eSIM

Most phones released in recent years allow you to use a physical SIM card in parallel with an eSIM profile. This means you can keep your home SIM card in the phone to receive calls and SMS, while using the plan from eSIModo exclusively for internet. Your phone will display two signal bars at the top of the screen, indicating that both networks are active.

When someone calls you on your usual number, your phone will ring just like it always does. At the same time, all apps that need internet (Instagram, Google Maps, WhatsApp) will use the cheap data “pipe” from the eSIM. It’s the most logical solution to avoid huge data roaming charges without giving up the ability to be contacted in case of emergency.

The correct setting to avoid unwanted costs

Although both lines are active, you need to pay attention to one essential setting so you don’t get any surprises on your bill. In your phone’s “Mobile Data” menu, you must select the eSIM as the main source for internet. At the same time, make sure that the “Data Roaming” option is enabled only for the eSIModo profile and disabled for your home SIM card.

Here are some golden rules for configuration:

• Set your home line as the default for voice (Default Voice Line).
• Set the eSIModo eSIM as the default line for data (Cellular Data).
• Disable “Mobile Data Switching” to prevent the phone from switching to your home number when the eSIM signal is weak.

SMS and banking authentication codes

Another big advantage of the Dual SIM system is that you can receive SMS for free while roaming in most networks. This is vital if you need to make online payments or log in to your banking app while you are abroad, because you will receive verification codes on your usual number. Without your home SIM active, these transactions would be impossible to complete.

With an active eSIM for internet, you can check your banking app or confirm payments instantly, without having to look for a Wi‑Fi network. Basically, your phone works exactly as it does at home, but with the advantage that all your internet usage is covered by a cheap local data plan. It’s a safe and efficient way to keep control of your finances while traveling.

WhatsApp calls vs. regular calls

Although you can receive regular calls on your number, remember that these can be expensive when you are abroad, both for you and for the person calling you. Once you have active internet from eSIModo, it’s much smarter to ask your close ones to call you on WhatsApp or FaceTime. The quality will be excellent and the data usage will be minimal, being included in your eSIM plan.

Choosing an eSIM from eSIModo turns your phone into a global device without forcing you to make compromises. You can see who is calling you on your home number, decide whether it’s worth answering or calling back for free over the internet and, most importantly, you stay in full control of your data usage. It is, without a doubt, the best way to travel in a modern and connected way.