How to Use an eSIM

Complete guide to using eSIM technology for your travels

1. How to use an eSIM for international travel?

Using an eSIM for international travel is a quick and simple process, designed to keep you connected from the moment you arrive.

You only need to purchase an eSIM compatible with your destination and your device. After purchase, you will receive a QR code and installation instructions, which you can activate directly from your phone settings.

Once installed, you can activate the eSIM before traveling or upon arrival at your destination. When you land, your device will automatically connect to the local network, allowing you to browse the internet without depending on public Wi-Fi or paying roaming charges.

With an eSIM for international travel you can:

  • Connect in multiple countries without changing cards
  • Avoid roaming costs
  • Keep your usual SIM active
  • Enjoy immediate and secure connection

It's a practical, flexible, and secure solution for staying connected while traveling anywhere in the world.

2. Does WhatsApp work with an eSIM?

Yes. You can use WhatsApp with an eSIM without any problem.

OneClickSim eSIM includes mobile data, which allows you to send messages, make calls, and video calls through WhatsApp, just like with any other internet connection.

Your WhatsApp number remains the same, as the app works associated with your usual number and uses the eSIM's mobile data to connect.

3. Why do messages appear on my eSIM if it's data-only?

Although OneClickSim eSIMs are designed primarily for mobile data and do not include traditional calls or SMS, in some cases automatic system messages may be received.

These messages are usually related to:

  • Network verifications
  • Carrier notifications
  • Automatic technical messages
  • Initial connection configurations

These are not conventional SMS for personal communication, nor do they imply that the eSIM includes a phone number to send or receive messages on a regular basis.

4. Can I transfer my eSIM to another phone?

Each OneClickSim eSIM is designed to be used on a single device.

Once installed and activated, the eSIM is linked to the device on which it has been configured and cannot be transferred or reused on another phone.

Our plans offer unlimited data, so you can browse without worrying about consumption, as long as the eSIM is used on the same device during the plan's validity period.

5. How to delete an eSIM?

Deleting an eSIM from your device is a simple process and can be done directly from your phone settings. Below, we explain how to do it according to the operating system.

📱 How to delete an eSIM on iPhone (iOS)

  1. Go to Settings
  2. Tap on Cellular or Mobile Network
  3. Select the eSIM you want to delete
  4. Tap on Delete Data Plan
  5. Confirm the action

Once deleted, the eSIM will no longer be active on the device.

🤖 How to delete an eSIM on Android

  1. Go to Settings
  2. Enter Mobile Networks or Connections
  3. Select SIM Manager or eSIM
  4. Choose the eSIM you want to delete
  5. Tap on Delete or Erase Plan
  6. Confirm the action

Menu names may vary slightly depending on the manufacturer and Android version.

Once deleted, the eSIM cannot be reinstalled on another device. We recommend deleting it only when you no longer need it or when the plan has ended.

6. When does the validity period start?

The validity period of your eSIM begins to count from the moment it is activated and connects for the first time to the network at the corresponding destination.

This means that the time does not start counting at the moment of purchase, but when the eSIM starts functioning and begins using mobile data.

For this reason, we recommend installing the eSIM in advance and activating it only when you arrive at your destination, to make the most of the plan's validity period.

7. What connection speed will I have?

With OneClickSim you can enjoy 4G and 5G connection, as long as your device is compatible and the network is available in the country or area where you are.

Connection speed may vary depending on factors such as local coverage, carrier infrastructure, geographic location, and network congestion. In areas with good coverage, you will be able to browse, use applications, make internet calls, and stream content without problems.

Our goal is to offer you the best speed available at each destination, automatically connecting you to the fastest compatible networks.

8. What happens if I run out of data?

With OneClickSim you don't have to worry about running out of data, as our plans offer unlimited data during the contracted validity period.

This allows you to browse, use applications, maps, and messaging services without interruptions or the need for additional top-ups, always within reasonable use according to our fair use policy.

This way, you can enjoy continuous connection during your trip with complete peace of mind.