What Is an eSIM? How Software SIM Cards Work
An eSIM is a digital SIM card built into your phone. It activates over Wi-Fi in minutes. No plastic card, no SIM swap, no roaming fees.
Last updated:
What Is an eSIM Card? eSIM Explained
Vodacom charges R29 per MB for international data roaming, which means a single day abroad can cost hundreds of rand. An eSIM is a digital SIM card soldered into your phone's circuit board that replaces those charges with a flat prepaid rate. Also written as e SIM or e-sim, it stores carrier profiles in software and gives you instant data abroad. No physical card to insert, no SIM tray to fiddle with at OR Tambo or Cape Town International. MTN and Cell C charge similar rates abroad. A HelloRoam eSIM plan comes in well below all three carriers.
The GSMA SGP.22 standard governs how phones store and switch these carrier profiles wirelessly, no physical swap needed. A virtual SIM or digital SIM card is another name for the same technology. Most phones sold in South Africa since 2019 include the chip: network-free iPhones (XS through iPhone 16), Samsung Galaxy devices (S20 through S25), and Google Pixels (3 through Pixel 9). Budget Android handsets from Vodacom and MTN starter ranges often do not, check the HelloRoam compatibility list before you buy. HelloRoam, built by FutureSyncs Ltd (Companies House 15950168), lets South African travellers ditch the Vodacom and MTN roaming add-on and connect the moment they land in London, Dubai, Sydney, or Mauritius.
What is an eSIM?
An eSIM is a built-in digital SIM that lets you activate a mobile plan without using a physical SIM card.
How to get an eSIM
- Check device compatibility
- Choose an eSIM plan
- Buy online
- Scan QR code or install manually
- Activate in settings
How Does an eSIM Work? (iPhone and Android Setup)
An eSIM works by using built-in software to download and store a cellular carrier profile on your phone. Once active, you connect to mobile networks, make calls, send texts, and use cellular data (mobile internet used by your phone for browsing, streaming, and apps), the same as a physical SIM card. How does an eSIM work on iPhone? On compatible models (XS and newer), go to Settings, Cellular, Add eSIM. How does it work on Android? The steps are nearly the same: Settings, Network, SIM manager. Most phones sold by Vodacom, MTN, Cell C, and Telkom SA since 2019 include a built-in eSIM chip, though some entry-level and budget handsets do not. Check our compatibility list if you are unsure about your model.
Getting started takes about 5 minutes: buy a prepaid eSIM plan, open your confirmation email, and scan the QR code. Your physical SIM card stays in place the whole time. You run both at once in dual SIM mode, with the e-sim handling international data at local rates and your Vodacom, MTN, or Cell C SIM keeping your South African number active for calls and texts. South Africans travelling to the UK, Australia, Dubai, or Mauritius can pre-load a plan before leaving OR Tambo or King Shaka International and be online the moment they land.
How Do You Set Up an eSIM?
Follow these steps to get started using an eSIM on your iPhone or Android device.
Set up an eSIM on your iPhone with the HelloRoam app
Choose a plan and pay online
Choose a prepaid data plan for your destination and complete checkout online or in the app.
Scan the QR code
Open your confirmation email and scan the QR code with your phone camera to install the eSIM.
Land and go
Your plan installs right away. It activates when you arrive at your destination country.
Set up an eSIM on Android with the HelloRoam app
Choose a plan and pay online
Choose a prepaid data plan for your destination and complete checkout online or in the app.
Scan the QR code
Open your confirmation email and scan the QR code with your phone camera to install the eSIM.
Land and go
Your plan installs right away. It activates when you arrive at your destination country.
Set up your eSIM using a QR code in the HelloRoam app
Scan the QR code to download HelloRoam
Scan the QR code with your phone to download the HelloRoam app from the App Store or Google Play.
Buy a data plan for your trip
Pick a prepaid data plan for your destination country and complete checkout in the app.
Your plan activates on arrival
Your plan installs before you leave and activates when you land. No SIM card swap needed.
Why eSIM Matters in 2026
Mobile connectivity has changed fast, and eSIM sits at the centre of that shift. The reasons are practical, not just technical.
Travellers today expect:
- Instant connectivity upon arrival
- No surprise charges
- No dependency on local stores or kiosks
- Switch between countries instantly
Traditional SIM cards struggle to meet these expectations. eSIM solves these problems by making connectivity digital-first.
On top of that, smartphone makers are increasingly dropping physical SIM trays from newer models, signalling a long-term industry shift toward eSIM-only devices.
Save up to 86% on
data costs
Plans start at R 16,79 with no contract and no hidden fees. If you never activate your eSIM, you can get a refund within 180 days.(Source: HelloRoam pricing analysis, 2026)
Browse PlansNot sure if your device supports eSIM?
Not all phones support eSIM, but most modern smartphones do.
However, compatibility can vary by region and carrier. Always check your exact model before you buy a plan.
Why this matters:
eSIM is a hardware feature. If your phone doesn't have it, no network or eSIM provider can add it for you.
eSIM benefits for international travel
Avoid roaming fees
Skip the hunt for a local SIM at OR Tambo or Cape Town International. An e SIM connects you to local carriers and gives you instant data at local network speeds, with no extra charges from Vodacom, MTN, or your home carrier.
Ready in seconds
Buy a plan online, scan a QR code, and you're connected in minutes. No post office run, no physical SIM card slot to deal with.
Keep primary number active
Your phone can hold multiple eSIM profiles at once. Switch between carriers or numbers without pulling out a tiny card or visiting a store.
Multi-country coverage
HelloRoam links you to 212+ mobile networks in 185+ countries, on 4G LTE and 5G.
Quick switching
No annual contracts. Pick a plan that fits your trip length and data needs, with no strings attached.
Backup connectivity
Lose your bag at Dubai International or get pick-pocketed in Bangkok? Your eSIM stays inside your phone. Nobody can remove or steal it.
Common Use Cases for eSIM
Travel
The most popular use case: affordable, instant mobile data abroad.
Business
Professionals can maintain multiple numbers or plans without juggling devices.
Remote Work
Reliable internet access across different countries without relying on Wi-Fi.
eSIM Disadvantages to Know Before You Buy
While eSIM offers many advantages, it's important to understand its limitations:
- Requires a compatible deviceMany budget Android handsets sold by Vodacom, MTN, and Cell C do not include an eSIM chip. Entry-level Samsung A-series and Huawei devices are common examples. Check the HelloRoam compatibility list before you buy a plan.
- Some older networks may not fully support itSome South African carrier-locked handsets from Vodacom or MTN block third-party eSIM profiles. If your phone is network-locked, contact your carrier to request an unlock before buying a travel plan.
- Initial setup may feel unfamiliar to first-time usersYou need Wi-Fi or mobile data to download the eSIM profile. Install it at home before you leave OR Tambo, Cape Town International, or King Shaka. Airport Wi-Fi works too, but doing it at home is faster and stress-free.
- Transferring eSIM between devices can require extra stepsFactory-resetting your phone deletes all eSIM profiles stored on it, and an installed HelloRoam eSIM cannot move to another phone. If your eSIM has not connected in your destination yet, HelloRoam support can issue a new one. After it connects, HelloRoam does not issue a new one, so contact support before you reset or switch phones.
These limitations are shrinking as adoption grows, but they are
still worth considering.
These limitations are shrinking as adoption grows, but they're still worth keeping in mind.
eSIM security and future technology
eSIM technology is built for both convenience and long-term mobile innovation. From stronger security protections to growing worldwide adoption, eSIM is shaping how travellers and connected devices stay online.
Supported by leading brands including Apple, Samsung, and Google.
eSIM vs SIM Card: Which Is better for international travel?
An eSIM is generally better than a physical SIM card for international travel because it activates instantly, costs less than roaming, and lets you switch networks without changing hardware. Travellers get faster setup, more flexibility, and lower overall costs.
Common eSIM Problems and Fixes
Stuck after scanning the QR code? Our 24/7 team is on WhatsApp, the fastest channel for most South African travellers. Carrier-locked Vodacom or MTN handsets and auto-activation timing trip up most people. The fixes below cover both.
- 1
- 1Clean your phone camera lens and make sure the QR code is well-lit.
- 2Hold your phone 15 to 30 centimetres from the code and tilt the screen slightly.
- 3If scanning fails, tap 'Enter Details Manually' and type in the SM-DP+ address and activation code from your HelloRoam confirmation email.
- 4If you are still stuck, message HelloRoam on WhatsApp for live help.
If your phone says the code is no longer valid, the eSIM may already be on your phone. Check your list of mobile lines before you scan again. - 2
- 1Restart your phone first.
- 2Then go to Settings and confirm the HelloRoam line is set as your active cellular data line and that Data Roaming is turned on for that line.
- 3If you are still on South African soil and bought an auto-activation plan, data will not go live until you arrive at your destination.
- 4If the issue persists abroad, message HelloRoam on WhatsApp with your order number.
Fix 2 of 6 · Recorded on iPhone · 0:10
Set the HelloRoam line for mobile data, under Mobile Data in Mobile Service. Recorded in UK English. - 3
- 1Open Settings and check your list of mobile lines first.
- 2The HelloRoam line might appear under another name, such as Secondary.
- 3If it's switched off, tap it and turn the line on.
- 4If you don't see it in the list, the install didn't finish, so read the error message on your screen.
- 5Confirm your phone supports eSIM and isn't locked to a carrier, such as Vodacom, MTN, or Cell C.
- 6Don't delete an eSIM to fix this: email help@helloroam.com with your order number and the error message.
- 4
- 1Go to Settings, then Cellular or Mobile Data, and tap the profile you want to remove.
- 2Choose 'Remove Cellular Plan' or 'Delete eSIM'.
- 3If the option is greyed out, the plan is still active.
- 4Turn it off first, then delete it.
- 5On Samsung Galaxy devices, open Settings, Connections, SIM manager, then tap the old profile and select Remove.
- 5
- 1Most phones let you store several profiles but only use one for data at a time.
- 2Go to Settings, then Cellular (iPhone) or SIM manager (Android), and choose which line handles mobile data.
- 3Turn off data roaming on your Vodacom, MTN, or Cell C SIM and set the HelloRoam line as the active data line.
- 4This stops both lines from trying to connect simultaneously.
- 6
- 1Check that you typed the activation code exactly as shown in your HelloRoam email, including any dashes or special characters.
- 2Connect to stable Wi-Fi and try again.
- 3If the code still fails, the plan may have expired or already been used on another device.
- 4Contact HelloRoam support via WhatsApp or email help@helloroam.com with your order number.
- 5Before your eSIM connects in your destination, HelloRoam can issue a new one.
Still stuck? Our team is here 24/7 on email, WhatsApp, live chat and in the app.
“eSIM technology is the biggest shift in mobile connectivity since the smartphone. Travelers no longer need to choose between staying connected and overpaying.”
Popular eSIM Destinations
Frequently Asked eSIM Questions
To activate an eSIM on a Google Pixel, open Settings, then tap Network and internet, then SIM cards, then the plus icon to add a new SIM. Choose Download a SIM instead, scan the QR code from your HelloRoam confirmation email, and follow the on-screen prompts. On Pixel 3 through Pixel 9, the process takes about 2 minutes on a stable Wi-Fi connection. Once installed, go back to Settings, Network and internet, SIM cards and set the HelloRoam line as your preferred data SIM. Turn on Data roaming for that line and you're sorted.
South Africans on Vodacom, MTN, or Cell C international roaming packages typically pay R180 to R540 per GB. A HelloRoam prepaid eSIM plan for the same destination costs far less per GB. On a 10-day UK trip using 5GB, that gap can save you hundreds of rand compared with activating a Vodacom Travel add-on.
An eSIM works with Vodacom, MTN, Cell C, and Telkom devices as long as the phone is carrier-free (not network-locked) and eSIM-compatible. Most South African carriers sell locked handsets, so confirm your phone is network-free before buying a plan. On a network-free Samsung Galaxy S20 or newer, go to Settings, Connections, SIM manager to add your HelloRoam profile. If your phone is carrier-locked, contact your carrier to request a release, which usually takes a few business days.
A SIM card is a small removable chip that links your phone to a mobile network. The physical version slots into a tray on the side of your device. An eSIM is the digital equivalent built directly into the phone's motherboard. Both give you calls, texts, and mobile data. The difference is that an e-sim stores multiple carrier profiles in software and switches between them without any physical swap. South Africans who travel frequently find eSIM more practical because they avoid buying a new SIM at every destination.
To set up an eSIM on a Samsung Galaxy (S20 and newer), open Settings, then Connections, then SIM manager, then Add mobile plan. Choose to scan a QR code, point your camera at the code in your HelloRoam confirmation email, and follow the on-screen steps. The profile installs in under two minutes on a stable Wi-Fi connection. Once installed, tap the HelloRoam line in SIM manager and set it as the default for mobile data. Turn on Data roaming for that line to connect to local networks when you land abroad.
Yes, you can use WhatsApp calls and messages over your HelloRoam eSIM data when travelling. WhatsApp runs entirely over an internet connection, so as long as your eSIM has active cellular data, voice calls, video calls, and messages all work normally. This is the most cost-effective way for South Africans to stay in touch with family back home because WhatsApp calls use a fraction of the data that a standard cellular minute costs abroad.
Yes, you keep your South African number when using eSIM abroad. Your Vodacom, MTN, Cell C, or Telkom number stays active on your physical SIM card. The HelloRoam eSIM runs as a second line that handles mobile data at local rates. Calls and texts still go through your physical SIM. WhatsApp, which runs over data, keeps working through the HelloRoam line and is the easiest way to call home from the UK, Dubai, Australia, or any other destination.
HelloRoam eSIM works on Telkom Mobile and Rain devices as long as the handset is eSIM-compatible and network-free (not carrier-locked). Telkom Mobile and Rain sell some devices locked to their networks, so confirm yours is unlocked before buying a plan. Compatible network-free models available in South Africa include the iPhone 13 and newer, Samsung Galaxy S21 and newer, and Google Pixel 6 and newer. If your phone is carrier-locked, contact Telkom Mobile or Rain directly to request a network unlock, which typically takes a few business days.
HelloRoam eSIM plans start at R 16,79 for fixed data packages. Fixed plans range from 3GB to 20GB, and unlimited daily options are also available. That saves up to 86% compared to international roaming add-ons from Vodacom, MTN, and Cell C. No monthly fees, no contracts, and no roaming surcharges from your home carrier. You buy the prepaid plan before your trip, scan a QR code, and it activates when you land. Prices are in USD; your bank converts to ZAR at the current exchange rate at checkout.
Yes. A HelloRoam eSIM data plan works through your phone's normal hotspot or personal-hotspot setting, the same as a physical SIM. Turn on the hotspot in your phone settings, connect your laptop or a second device over Wi-Fi, and it draws from the same data plan. Sharing a fixed data plan across devices uses it up faster. Check your remaining balance in the HelloRoam app if you plan to hotspot for more than a quick task.
Yes. Adding an eSIM does not disable your physical SIM slot. Most eSIM phones, including every iPhone from the XS (2018) onward, run both at once in dual SIM mode. Your physical SIM can keep handling calls and texts on your home number. Your HelloRoam eSIM handles data on the local network at your destination.
Consumer eSIM technology dates to 2016, when the GSMA published SGP.22, the remote provisioning standard phones still use. Apple brought eSIM to the iPhone with the XS in 2018, and Samsung and Google flagships followed. Most flagship phones now ship with an eUICC chip built in, though some budget models still skip it. HelloRoam uses that same SGP.22 standard to deliver travel plans.
Sources
- GSMA eSIM Specification (SGP.22)(Accessed April 2026)
- ITU-T Recommendation E.118 — International Telecommunication Charge Card(Accessed April 2026)
- Apple — About eSIM(Accessed April 2026)