Go to Settings > Cellular, then make sure you have at least two lines (below SIMs). To add a line, see Set up cellular service on iPhone.
Turn on two lines—tap a line, then tap Turn On this Line.
You can also change settings such as Cellular Plan Label, Wi-Fi Calling (if available from your carrier), Calls on Other Devices, or SIM PIN. The label appears in Phone, Messages, and Contacts.
Choose the default line for cellular data—tap Cellular Data, then tap a line. To use either line depending on coverage and availability, turn on Allow Cellular Data Switching.
You may incur roaming charges if Data Roaming is on and you’re outside the country or region covered by the carrier’s network.
Choose the default line for voice calls—tap Default Voice Line, then tap a line.
Wi-Fi Calling must be turned on for a line to enable that line to receive calls while the other line is in use for a call. If you receive a call on one line while the other is in use for a call, and no Wi-Fi connection is available, iPhone uses the cellular data of the line that is in use for the call to receive the other line’s call. Charges may apply. The line that is in use for the call must be permitted for data use in your Cellular Data settings (either as the default line, or as the non-default line with Allow Cellular Data Switching turned on) to receive the other line’s call.
If you don’t turn on Wi-Fi Calling for a line, any incoming phone calls on that line (including calls from emergency services) go directly to voicemail (if available from your carrier) when the other line is in use; you won’t receive missed call notifications.
If you set up conditional call forwarding (if available from your carrier) from one line to another when a line is busy or not in service, the calls don’t go to voicemail; contact your carrier for setup information.
If you make a phone call from another device, such as your Mac, by relaying it through your iPhone with Dual SIM, the call is made using your default voice line.
If you start an SMS/MMS Messages conversation using one line, you can’t switch the conversation to your other line; you need to delete the conversation and start a new conversation using the other line. Also, you may incur additional charges if you send SMS/MMS attachments on the line that’s not selected for cellular data.
Instant Hotspot and Personal Hotspot use the line selected for cellular data.
All iPhone models that support eSIM can have multiple eSIMs and use Dual SIM with two active SIMs at the same time. You can use Dual SIM by using a physical SIM and an eSIM. iPhone 13 models and later also support two active eSIMs.
If you have a phone with a dual-SIM tray (i.e. a SIM tray that supports two SIM cards), you can purchase a local tourist or prepaid SIM card at your destination upon arrival. Simply insert the second SIM card in the empty SIM slot, and activate it in your device settings.
On your iPhone, go to Settings > Mobile Data.Tap Convert to eSIM. If you can't see Convert to eSIM, your network provider doesn't support this option. Contact your network provider to move your phone number from your physical SIM to an eSIM using eSIM Carrier Activation or by scanning a QR code.
A mobile phone that can simultaneously hold and use two different SIM cards from different network carriers or providers is known as a dual SIM phone. The phone can be connected to two different mobile networks, receive calls/messages on both numbers and switch between them as necessary.
Does using multiple eSIM profiles reduce battery life? Yes, if you are using multiple eSIM profiles at the same time, then it definitely does consume more battery than if you were to just have a single eSIM profile. However, this is no different from using two physical SIMs, as in the case of a dual-SIM.
Here are some of the many ways you can use Dual SIM: Use one number for business and another number for personal calls. Add a local data plan when you travel to another country or region.
You can set your phone to airplane mode before arriving at your destination and keep it there while traveling abroad so that your phone doesn't use data. You'll just have to manually connect to Wi-Fi or Bluetooth if you'd like to use these options while abroad.
The advantage of keeping your primary cellular plan on while you're also using an eSIM data plan is that you're fully reachable on your regular phone number. If there's an emergency back home while you're traveling, you'll continue to receive calls and texts.
Option 3: Rely on Wi-Fi Only. You can avoid paying all international roaming fees by keeping your phone in airplane mode and sticking with whatever free Wi-Fi you can find, or by renting a Wi-Fi pod.
One physical SIM and one eSIM; available on iPhone XR, iPhone XS, iPhone 11, iPhone 12, iPhone 13, iPhone SE (2nd generation), and iPhone 14 and later (purchased outside the U.S.)
Two eSIMs; iPhone 13, iPhone SE (3rd generation), and later.
DSFA (Dual SIM Full Active) phones allow both SIM cards to connect, meaning you could get a call on both lines at the same time. If you get an incoming call on line two during a call on line one, you'll receive an alert and can handle both calls.
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> Cellular, then make sure you have at least two lines (below SIMs). To add a line, see Set up cellular service on iPhone.
> Cellular, then make sure you have at least two lines (below SIMs). To add a line, see 