How to Activate and Use eSIMs: The Ultimate Guide
eSIMo Team
August 16, 2026
eSIMs, or embedded SIM cards, are the latest innovation in SIM card technology, and are becoming increasingly popular due to their convenience and flexibility. With eSIMs, you can easily switch between different phone numbers and data plans, without having to physically swap out SIM cards. And with eSIMo, you have the option to purchase eSIMs from an online retailer, making the process even more convenient.
But before we dive into the activation process, let's first make sure your device is eSIM-compatible. Most newer smartphones, such as the iPhone XS and newer, the Google Pixel 3 and newer, and the Samsung Galaxy S20 and newer, are eSIM-compatible. You can check your device's manual or the manufacturer's website to see if it supports eSIMs.
Once you've confirmed that your device is eSIM-compatible, it's time to purchase an eSIM. As mentioned earlier, you can purchase eSIMs from your mobile carrier, or from online retailers such as eSIMo. This way you can have your eSIM ready before you activate it.
The process for activating an eSIM will vary depending on your device and carrier, but we'll walk you through the steps for the most popular devices.
iPhone:
- Go to the Settings app.
- Select Cellular.
- Select Add Cellular Plan.
- Scan the QR code on the eSIM card, or enter the activation code manually.
- Select the eSIM as your primary line.
Google Pixel:
- Go to the Settings app.
- Select Network & internet.
- Select Mobile network.
- Scan the QR code on the eSIM card, or enter the activation code manually.
- Select the eSIM as your primary line.
Samsung Galaxy:
- Go to the Settings app.
- Select Connections.
- Select SIM card manager.
- Scan the QR code on the eSIM card, or enter the activation code manually.
- Select the eSIM as your primary line.
Once your eSIM is activated, you can use it just like a traditional SIM card. You'll be able to make and receive calls and texts, and use data just like you would with a traditional SIM card. And since you can activate multiple eSIMs on your device, you can easily switch between different phone numbers and data plans as needed.
One of the best things about eSIMs is that you can use them when you travel internationally. With an eSIM, you can purchase a local data plan for the country you're visiting, which can save you a lot of money on roaming charges. Just make sure to check with your carrier to see if they offer international eSIM plans, and if there are any restrictions or additional fees.
Another great thing about eSIMs is that you can use them in IoT and M2M applications. eSIMs are becoming increasingly popular in the Internet of Things (IoT) and machine-to-machine (M2M) applications because they can be remotely provisioned, meaning you can easily change or update the SIM card's settings without having to physically access the device.
In conclusion, eSIMs are a convenient and flexible alternative to traditional SIM cards. With the option to purchase from online retailers like eSIMo, activating and using eSIMs on your device has never been easier. And with the ability to switch between different phone numbers and data plans, as well as the added
📞 International Calls & Second Numbers (New in 2026)
eSIM technology today goes beyond data — it now supports integrated calling features and second phone numbers, revolutionizing how users communicate globally.
✨ International Calling With eSIMo
With eSIMo’s platform, users can make international calls directly from their device without needing additional apps or expensive roaming plans. This feature lets travelers, professionals, and remote workers stay connected across borders with crystal-clear voice quality and transparent rates.
📲 Second Phone Number for Flexibility
eSIMo also enables users to add a second mobile number on the same device. This is ideal for:
- Business and personal separation
- Maintaining privacy while traveling
- Using a local number in a destination country
- Managing multiple regions or professional identities
This second number can receive calls and SMS without swapping SIM cards — significantly improving user convenience in a globalized world.
What is an eSIM and how does it work?
An eSIM (embedded SIM) is a digital SIM profile built into your device that lets you download and activate mobile plans without a physical SIM card. It works by storing carrier credentials on your phone securely, enabling you to switch carriers, add plans, and manage connectivity via software instead of hardware.
Which devices support eSIM in 2026?
Most modern smartphones, tablets, and connected devices support eSIM, including:
- Apple iPhone models (from XS and later; including iPhone Air eSIM-only devices)
- Samsung Galaxy S and Z series
- Google Pixel models
- Some tablets (iPad) and laptops
- If your device has an eSIM option in settings, it likely supports it.
How do I activate an eSIM on my phone?
Activating an eSIM typically involves:
- Choosing an eSIM provider (like eSIMo)
- Scanning a QR code or using an app link provided by your carrier
- Following on-screen prompts to download and install the profile
- Setting a plan as active in your device’s cellular settings
This process avoids physical SIM swaps and can be completed in minutes.
Can I use eSIM and a physical SIM at the same time?
Yes — many devices support dual SIM functionality with both eSIM and a physical SIM card. This lets you keep two active numbers or plans on one phone, ideal for business and personal use or travel + local connectivity.
What are the benefits of using eSIM?
- Instant activation without waiting for a SIM card
- Multiple profiles on one device
- Improved security (digitally stored rather than removable)
- Global travel connectivity with easy plan switching
- Cost savings by avoiding roaming charges and buying local SIMs
How do I switch between eSIM plans?
On devices with eSIM support, you can go to:
Settings → Cellular / Mobile Data → eSIM plans, then:
- Select the plan you want active
- Enable or disable plans
- Rename plans for personal/business/travel
Switching does not require restarting your device in most cases.
What is an eSIM and how does it work?
An eSIM (embedded SIM) is a digital SIM profile built into your device that lets you download and activate mobile plans without a physical SIM card. It works by storing carrier credentials on your phone securely, enabling you to switch carriers, add plans, and manage connectivity via software instead of hardware.
What are the benefits of using eSIM?
- Instant activation without waiting for a SIM card
- Multiple profiles on one device
- Improved security (digitally stored rather than removable)
- Global travel connectivity with easy plan switching
- Cost savings by avoiding roaming charges and buying local SIMs
Does eSIM support international calls?
Yes — some eSIMo provides international calling features. This allows you to make and receive calls to numbers worldwide without traditional roaming plans or calling apps. Always check specific calling rates and terms with your provider.
Can I have a second phone number with eSIM?
Yes — eSIMo makes it easy to add a second number on the same device using a separate profile. This is useful for:
- Business vs personal use
- Travel (local number + home number)
- Privacy and international communications
Second numbers work like any other line for SMS and calls where supported.