Avoid Billing Surprises: How to Configure Your eSIM for Traveling Without Extra Charges
📱 $800 USD Bill Upon Return? How to Shield Your Cell Phone Against Unexpected Roaming Charges
📍 What you'll find in this blog
You had a spectacular two-week vacation, ate delicious food, took great photos, and supposedly had internet the whole time thanks to your international (travel) SIM/eSIM. You return home and suddenly, a notification arrives from your local phone carrier – an invoice for over $800 USD.
The perfect trip turns into a financial headache, and you feel a sense of insecurity. You wonder: "But how? I had my international SIM/eSIM data active the whole time!" What was supposed to be a smart saving ended up as a debt due to a poorly performed configuration.
🔌 How do I configure my "local SIM/eSIM" versus my "Conecty SIM/eSIM" to avoid extra charges?
For a physical SIM, you must turn off your cell phone, remove your local SIM with the metal clip found in your envelope and store it in a safe place in your wallet (if it has dual SIM, it's better to remove it so it doesn't search for a signal abroad), then insert the Conecty SIM.
iPhone: Turn your device back on and wait for it to get a signal (approx. 3 minutes). Go to Settings > Cellular > Enter the Conecty SIM (travel) and activate Data Roaming.
Android (Samsung/Xiaomi/Google): Once you have the Conecty SIM installed in your phone, restart it and wait for it to get a signal (approx. 3 minutes). Go to Settings > Connections > SIM Card Manager. In the "Mobile data" section, select the blue dot only for your Conecty SIM and activate Data Roaming.
Important: You should only activate Data Roaming after you have removed your local SIM and only the Conecty SIM is installed.
💡 Now let's go step-by-step on how to do it with eSIM
📱 eSIM Setup on Your Device
iPhone: Go to Settings > Cellular > Cellular Data and strictly select your Conecty eSIM to set it as the default line for browsing. Tap on your local eSIM and turn off the "Turn On This Line" switch (the button will change from green to gray).
Android (Samsung/Xiaomi/Google): Go to Settings > Connections > eSIM Card Manager. In the "Mobile data" section, activate the blue dot only for the Conecty eSIM and deactivate the local eSIM.
Keep in mind that for the Conecty SIM/eSIM to work, you must have the roaming or data roaming button activated. But don't worry, since you've already completed this step, it won't generate extra costs with the operator.
Important: If you manage your local line from an eSIM, you should not delete it. In Colombia, your local eSIM has your phone's IMEI registered with your local phone carrier. If you accidentally delete it, reactivating it usually requires tedious procedures or going in person to an office for security reasons. To avoid this, simply go to its settings and choose "Deactivate this line" (or turn off), thus safely pausing it.
The Hidden Enemy: Why Does Your Cell Phone Use Roaming Data Without Your Permission?
Having a modern cell phone with the ability to have multiple eSIM profiles at all times is wonderful, but if the proper configuration isn't done, it can be dangerous.
The big pain point here is called "Automatic Data Switching." Your phone doesn't want to lose signal, so if you're on the subway in Paris or crossing a highway and the signal of your travel SIM/eSIM weakens for a second, the phone decides to connect to the internet of the local SIM/eSIM (this happens because your local SIM is active), and that's where extra costs come in without you realizing it.
Your local operator detects the foreign antenna and activates international roaming for the day at a very high price. And the worst part is that many travel internet providers only tell you in their manuals: "Activate data roaming," but they don't clarify that you must do it exclusively on the secondary line (the travel one).
The unfiltered reality: how much does roaming cost today?
📲 Understanding Roaming and International eSIM
Sometimes we think roaming is a myth of the past, but it's still alive and kicking. The rates of traditional local operators when you travel without a contracted plan can be a mistake that you'll later see on your bill. According to user reports and consumer advocacy pages, bills for data and calls without control can easily exceed $500 or $800 USD on a single trip.
To give you an idea:
Extra call minute: can cost you between $1 to $3 USD depending on where you are and your local operator.
"Trickle" internet: If you don't have an active plan, 1GB of data can be charged up to an additional $7 USD to your plan.
When your phone automatically searches for a signal, it connects to the first foreign antenna it finds, and your operator assumes you agree to pay those rates. Because roaming is like a faucet that doesn't turn off; you can consume whatever you want, but in the end, they charge you for all of it.
Traditional Roaming vs. International (Travel) SIM/eSIM
We're not here to tell you what's obligatorily better; we want you to know all the details of each service available on the market and choose the option that best suits your travel style and your budget.
| Feature | Traditional Roaming 📞 | International eSIM 📶 |
|---|---|---|
| Price | Variable/high. You pay fixed daily rates (between $5 and $10 USD per day in addition to your monthly plan) or usage-based rates that can get out of control. | Prepaid and controlled. You know exactly how much you pay from the start, and there are no surprises upon your return. |
| Network speed | Variable (low). Local operators usually prioritize their native users, so roaming sometimes feels slow or "heavy." | High. Connects directly to a local line in the country you're visiting, ensuring better speed (4G/5G), so you browse like a local. |
| Customer Service | A headache. If something goes wrong, calling the local operator from abroad is an odyssey: you wait eternal hours, and they might not even fix it. | Close and fast. In Conecty's case, you message us via WhatsApp, and we resolve it in minutes. |
We know you might have these questions
1. Why was a roaming charge activated on my main SIM if I already had the Conecty eSIM installed?
Think of your phone as a car with two gas tanks: tank A (local SIM/eSIM with active roaming) and tank B (Conecty SIM/eSIM). Even if you tell the car to use tank B, if you leave the valve of tank A ajar and the engine senses that tank B has low pressure, it will start drawing gas from tank A (the local SIM/eSIM that opens with uncontrolled roaming) without notifying you on the dashboard. That momentary "suck" activates your local operator's automatic charges.
How can I be sure that my phone won't switch to the main SIM if the eSIM signal is weak?
If you apply our protocol of removing the physical SIM or completely deactivating the local eSIM, your phone will simply have nowhere to switch to. There's no physical or digital way for it to jump to your local line. You'll avoid pressing dangerous buttons and ensure zero consumption on your local bill.
Is it necessary for the main SIM to be on to receive text messages from my bank without being charged for data?
Keep in mind that by removing your physical SIM or turning off your local eSIM, your regular line will be paused, so you won won't be able to receive calls or text messages (SMS) during your trip.
Extra Security Rules
To enjoy your trip with the real peace of mind knowing that you won't come home to unnecessary debts, apply these three extra security rules:
- Clear names to avoid doubt: The brain gets confused quickly, especially when you're tired after a 10-hour flight. Don't leave your lines as "SIM 1" and "SIM 2". Rename them today in your settings. Name your usual SIM "Personal / Home" and your eSIM "Conecty Travel". This way, any menu will speak to you clearly.
- Configure your phone without fear, make sure to turn off your local eSIM, and dedicate yourself to enjoying the journey knowing that at Conecty, we've got your back and your wallet from beginning to end. ✈️📶
Autor:
Camila Rodríguez
Camila Rodríguez is a marketing professional by trade, a researcher by curiosity, and a traveler by obsession, specializing in creating content for hyperconnected travelers. Her approach merges two of her great passions: new technologies and international connectivity (because, let's be honest, losing signal at the end of the world is no longer in style). Camila writes with empathy and freshness, discarding boring speeches or brochure clichés to make the reader feel identified. Her method is based on less theory and more practice: she researches thoroughly, analyzes trends, and tests digital tools before recommending them. She offers a perfect combination of real stories, useful technology, and life-saving data to meet the needs of travelers on the go: what apps to download, how to stay connected in any corner of the planet, and what mistakes to avoid to prevent suffering in the attempt. For Camila, creativity is not an embellishment, but the bridge to connect with people and their stories, inviting them to put away the map, take out their cell phone, and explore the world with the right information and the best signal.
