Dual SIM: one iPhone, two numbers
Two phones. One for work, one for personal use. You know that feeling? Constantly juggling two devices, two chargers, and installing all the apps twice. Or maybe you keep switching SIM cards when you go abroad. Annoying and unnecessarily complicated.
But what if you could just use one iPhone with two numbers at the same time ? Many people don't realize that most modern iPhones have had dual SIM functionality for years. In fact, you're probably only using half of what your phone can do.
With dual SIM, you can keep your work and personal life separate on one device, save significantly on international data charges, and never have to choose which phone to take with you again. All you need? The right iPhone and five minutes to set it up.
Useful links
- iPhone collection - Discover all dual SIM models
- Accessories - Cases and protection for your dual SIM iPhone
- AirPods - Switch effortlessly between both songs
What exactly is dual SIM?
Dual SIM simply means your iPhone can use two SIM cards or a combination of a physical SIM and eSIM. This gives you two active phone numbers on one device. The technology has existed in Android devices for years, but Apple only introduced it with the iPhone XS and XR series in 2018.
Most modern iPhones use a physical nano-SIM card plus a digital eSIM. Only the iPhone 13 series and later from China have room for two physical SIM cards. In the US, the latest models are even entirely eSIM-only.
Who is dual SIM interesting for?
The business user
The most obvious scenario: one number for work, one for personal. You can be reached on both numbers without having to carry two phones. In the evenings and on weekends, simply turn off your business line. No more missed calls because you had the wrong phone.
The international traveler
Do you regularly travel abroad? Keep your Dutch number for WhatsApp and important calls, while making local calls and using data with a second SIM card. This saves you a lot on roaming charges, especially outside the EU. A local prepaid SIM card often costs only a few euros.
The bargain hunter
Combine the best of two providers. For example, use a high-data plan from one provider and a budget-friendly calling plan from another. Or switch between networks if coverage is poor in certain areas.
Which iPhones support dual SIM?
All iPhones from the XS and XR series have dual SIM capabilities:
- iPhone XS, XS Max, and XR
- iPhone 11, 11 Pro and 11 Pro Max
- iPhone SE (2nd and 3rd generation)
- iPhone 12 series (all models)
- iPhone 13 series (all models)
- iPhone 14 series (all models)
- iPhone 15 series (all models)
Please note: You need at least iOS 12.1. Older models such as the iPhone X, 8 or 7 do not support dual SIM.
How do you configure dual sim?
The setup is surprisingly simple:
- Insert the SIM cards : Open the SIM tray using the provided pin. For most models, you insert one physical SIM card. The second line is activated as an eSIM.
- Activate the eSIM : Go to Settings > Mobile Network > Add Mobile Plan. Scan your provider's QR code or enter the information manually.
- Enter labels : The system automatically asks for labels such as 'Private' and 'Business'. This makes it clear which number you're using.
- Set preferences : Determine which number you use by default for calls, messages, and data. You can always change this in the settings.
Practical tips for daily use
Calls and messages
For outgoing calls, you choose which number to use. The iPhone remembers the last number you used for each contact. Convenient: you can automatically call colleagues with your work number and friends with your home number.
In the Messages app, you can see which line is active at the top. Switch between numbers with a single tap. For incoming messages, you'll immediately see which number they're on.
Manage data usage smartly
You can only use one SIM card for mobile data at a time. It's wise to set the SIM card with the largest data allowance as the default. Traveling abroad? Then switch to your local SIM card for data.
Tip: Enable "Switch Mobile Data" in your settings. This allows your iPhone to automatically use the other SIM card for data if your primary line is out of service.
Battery consumption
Dual SIM uses a bit more battery because your phone is constantly monitoring two networks. The difference is usually negligible, about 5-10% more usage per day. Turn off unused lines during vacations or long meetings to save battery.
Frequently asked questions
Can I use WhatsApp with both numbers?
No, WhatsApp only works with one number per device. You have to choose which number you use for WhatsApp. For two WhatsApp accounts, you still need two phones.
Does dual SIM work with all providers?
Most Dutch providers support dual SIM and eSIM. Check with your provider to see if they offer eSIM. Some affordable MVNOs (virtual providers) don't yet offer eSIM.
Can I use both SIM cards at the same time?
Yes and no. You can receive calls and messages on both numbers. However, during a call on one line, you won't be reachable on the other, unless your provider supports Wi-Fi calling.
What should you pay attention to?
Before purchasing, check whether your iPhone supports dual SIM. Refurbished models from the XS and XR series are perfectly compatible and significantly more affordable than new devices. However, pay attention to the region where the device is manufactured. Chinese models have different SIM configurations.
Important: Some business phones are SIM-locked or have restrictions on dual SIM. Check with your employer before adding a second SIM card to your business phone.
Conclusion
Dual SIM on the iPhone is an underrated feature that can significantly simplify your daily life. Whether you want to separate your work and personal life, travel smart, or simply combine the best of both providers—the possibilities are endless. Setup takes five minutes, and after that, everything works automatically. With the right iPhone, you get two phones in one.
The practical solution for multiple numbers
Dual SIM on your iPhone proves to be a practical solution for everyday problems. No more hassle with two phones, easily switch between providers abroad, and a clear separation between work and personal life.
The feature is standard on iPhones from the XS and XR series onwards , so it's probably also in your device. Setting it up takes a few minutes and then you can do everything with a single tap . For those who regularly juggle multiple numbers or SIM cards, this is the solution you've been looking for for years.
