How To Make Phone Calls With Data-Only eSIM?

With the increasing popularity of eSIM technology, making phone calls using data-only eSIM has become a viable option for many users. Whether you are traveling internationally or prefer a more flexible approach to communication, making phone calls with a data-only eSIM will open up a world of possibilities for communication and cost savings.

This article will provide a comprehensive guide on how to make phone calls using a data-only eSIM.

What is a Data-Only eSIM?

A data-only eSIM is a type of eSIM (embedded SIM) that is specifically designed for data usage. Unlike traditional SIM cards that provide both data and voice capabilities, a data-only eSIM focuses solely on providing data connectivity to your device. It means that it does not come with a phone number for making traditional voice calls.

Data-only eSIMs are commonly used in devices such as tablets, smartwatches, and IoT (Internet of Things) devices, where the primary need is for internet connectivity rather than voice communication. These eSIMs can be activated with a data plan from a service provider, allowing you to access the Internet, browse websites, use apps, and perform other data-related activities.

While data-only eSIMs do not support traditional voice calls, there are alternative methods to make phone calls using data connectivity. This typically involves using internet-based calling apps such as WhatsApp, Skype, Google Voice, or FaceTime. These apps utilize Voice over Internet Protocol (VoIP) technology to make calls over the Internet, allowing you to communicate with others even without a traditional phone number.

It is important to note that the availability and functionality of data-only eSIMs may vary depending on your device, service provider, and location. It is recommended to check with your device manufacturer and service provider for specific details and options regarding data-only eSIM usage.

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Making Phone Calls with a Data-Only eSIM

If you have a data-only eSIM and want to make phone calls, here we provide two methods you can consider:

1. Use Messaging or VoIP (Voice over Internet Protocol) Services:

One option is to use VoIP services that allow you to make calls over the Internet. There are various apps and platforms available, such as WhatsApp, Skype, Google Voice, FaceTime, or Hushed. These services typically require an internet connection and can be used to make calls to other users of the same app or even traditional phone numbers.

2. Use Native Dialer Integration (The Seamless Method):

Modern smartphones can use a data-only eSIM to enable calling on your primary number.

On iPhone (Using “Wi-Fi Calling” on Other Cellular):

• Ensure your primary SIM (with your home number) is active and has Wi-Fi Calling enabled in its settings before you travel.
• Insert and activate your data-only eSIM.
• Go to Settings > Cellular > [Your Primary SIM].
• Tap Wi-Fi Calling and enable “Wi-Fi Calling on This iPhone.“
• Below, select “Use Secondary Data for Wi-Fi Calling” or “Cellular Data Switching.”
• Now, your iPhone will use your data-only eSIM’s connection to place and receive calls using your primary phone number, avoiding roaming charges.

On Android (Using “Backup Calling”):

• Ensure your primary SIM has Wi-Fi Calling enabled.
• Go to Settings > Network & Internet > SIMs > Your Primary SIM.
• Enable “Wi-Fi Calling” and then look for “Backup Calling” or “Use SIM for Calling.”
• Select your data-only eSIM to be used as the backup internet source for calls.

The terminology may vary by manufacturer (Samsung, Pixel, etc.), but the functionality is widely supported.

It is important to note that the specific options available to you may depend on your device, eSIM provider, and location. It is recommended to check with your eSIM provider and explore the features and options they offer for making phone calls with a data-only eSIM.

Remember that making phone calls with a data-only eSIM may incur additional charges, especially if you are calling traditional phone numbers or making international calls. It is advisable to review the pricing and terms of your eSIM plan to understand any potential costs associated with phone calls.

Always ensure that you have a stable internet connection when using VoIP services or Wi-Fi calling to ensure the quality of your calls.

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Important Considerations

• Call Quality: VoIP call quality is directly tied to your data connection strength. A stable 4G/LTE or 5G connection is required for clear calls. Avoid making calls on weak or congested networks.
• Data Usage: Voice calls consume minimal data (approx. 0.5-1.5 MB per minute). Even a small data plan (1-5GB) can support hundreds of call minutes.
• Check Compatibility: Always confirm that your smartphone is unlocked and eSIM-compatible before purchasing a plan. The native dialer integration feature requires a relatively modern device (iPhone XR/XS or newer, Android 12+).