What is an eSIM & How to Set One Up: Ultimate Guide

The way we connect our devices is changing. If you’re still relying on traditional SIM cards, it might be time to consider switching to an eSIM. Whether you’re managing mobile connectivity for a large business, setting up your new iPhone, or planning international travel, understanding what an eSIM is (and how to use it) can save you time, money, and frustration.

In this guide, we’ll explain what an eSIM is, how it works, and how to activate one on iPhone or Android. We’ll also explore the benefits of business eSIMs vs. consumer eSIMs, and why so many UK companies are making the switch.

Already clued up on eSIMs and want one for yourself? Browse our full range of Business eSIM deals and get yours now.

1. What is an eSIM?

An eSIM (short for embedded SIM) is a digital SIM card built directly into your smartphone, tablet, or smartwatch. Unlike a traditional SIM, there’s no physical card to insert or swap. Instead, your mobile network profile is downloaded onto your device via a secure connection.

It does everything a physical SIM does; connects you to a network, enables calls, texts and data… but with added speed, convenience, and security.

🔑 Key Benefits of eSIM:

• Less chance of damage, theft, or SIM loss
• No physical SIM required
• Instant activation via QR code or app
• Store multiple profiles on one device (ideal for business & travel)
• Remote provisioning for IT teams or network providers
  

2. eSIM vs Traditional SIM: What’s the Difference?

In short: eSIMs are faster, safer, and smarter.

3. Does My UK Network Support eSIM?

Yes – most major UK networks now support eSIM, including:

• EE: Supports eSIM for phones, wearables and business users
• O2: eSIM available for pay monthly and business plans
• Vodafone: Offers eSIM across consumer and business contracts
• Three: eSIM support is now live for selected phones and business plans
  
  

Not all devices or plans support eSIM by default, so it’s best to check with your provider or device manufacturer. Visit our Business eSIM deals to find your favourite!

4. Business eSIM: Why It’s Better Than Consumer eSIMs

eSIMs are especially powerful for businesses. If your company relies on mobile teams, remote staff, or is managing multiple devices, a business eSIM setup can save serious time and money.

✅ Benefits of Business eSIMs:

• Faster onboarding: Activate new staff or replace devices instantly
• Central management: Provision and control eSIMs across your team
• BYOD-friendly: Add work lines to personal phones (dual SIM)
• Secure: eSIMs can’t be lost, cloned or removed
• Multi-network flexibility: Switch between providers (EE, Vodafone, O2, Three) remotely
• Tailored plans: Business eSIM deals often include discounted rates, bulk pricing, and account management
  
  

At BusinessMobiles.com, we offer bespoke business eSIM plans across all major UK networks, with same-day activation, expert support, and cost-effective bundles.

🛒 Browse our full range of Business SIM-only deals here.

5. How to Set Up an eSIM

Setting up an eSIM is quick and straightforward. Here’s how to get started, whether you’re using an iPhone or Android phone:

a) How to Set Up an eSIM on iPhone

Apple has supported eSIM since the iPhone XS. Newer models even support dual eSIM (two active profiles with no physical SIM).

Steps:

1. Check compatibility
   Go to Settings > General > About and look for “Available SIM” or “Digital SIM”.
   
   
2. Get your eSIM QR code
   Your mobile provider (or BusinessMobiles.com) will send a QR code to scan.
   
   
3. Activate your eSIM
   • Go to Settings > Mobile Data > Add eSIM
   • Tap Use QR Code
   • Scan the code provided
   • Follow the prompts to label your line (e.g. Work, Personal)
     
     
4. Choose your default line
   You can use your eSIM for calls, texts and data, or set up both SIMs to work side-by-side.

Want to learn more? Read the official eSIM iPhone guide from Apple.

b) How to Set Up an eSIM on Android

Most Android flagships now support eSIM, including Samsung Galaxy, Google Pixel, and newer Motorola and Sony models.

Steps (Samsung Galaxy example):

1. Check eSIM support
   Go to Settings > Connections > SIM Manager
   If “Add Mobile Plan” appears, your device supports eSIM.
   
   
2. Obtain your QR code
   Your provider or eSIM service will send a QR code to activate your line.
   
   
3. Activate your eSIM
   • Open SIM Manager
   • Tap Add Mobile Plan
   • Scan the QR code
   • Confirm download and profile activation
     
     
4. Label and manage lines
   Assign names like “Work” or “Travel” for easy switching.
   

Tip: Some devices also allow you to manually enter activation details if a QR code isn’t available.

6. Frequently Asked Questions

7. Final Thoughts: Is eSIM Right for Your Business

Whether you’re an individual tired of fiddling with SIM trays, or a business looking to modernise your mobile setup, eSIM is the future of mobile connectivity.

It’s faster, more secure, and built for how we use devices today. With support from all major UK networks and growing device compatibility, there’s never been a better time to make the switch.

Already have a phone but need a number? Learn how to get a UK business number for free now!