Your other number will be your default. If you want your iPhone to use cellular data from both plans, depending on coverage and availability, turn on Allow Cellular Data Switching.
When you call one of your contacts, you don't need to choose which number to use every time. By default, your iPhone uses the same number that you used the last time you called that contact. If you haven't called that contact, your iPhone uses your default number. If you want to, you can specify which number to use for your calls with a contact.
Follow these steps:. With iOS 13 and later, when you're on a call, if the carrier for your other phone number supports Wi-Fi calling, you can answer incoming calls on your other number. You will need to turn on Allow Cellular Data Switching when you are on a call that isn't your default data line. Check with your carrier for Wi-Fi calling availability, and find out if additional fees or data usage applies from your data provider.
If your carrier doesn't support Wi-Fi calling or you don't have Wi-Fi calling turned on, 1 then when you're on a call, an incoming call on your other phone number will go to voicemail, if you have voicemail set up with your carrier. Call Waiting works for incoming calls on the same phone number. To avoid missing an important call, you can turn on call forwarding and forward all calls from one number to the other.
Check with your carrier for availability and to find out if additional fees apply. Or if you're using iOS Update to iOS 13 or later to receive calls when you're using your other number. If data roaming is on for the number that uses cellular data, then Visual Voicemail and MMS will be disabled on your voice-only number.
You can switch phone lines before you make a call. If you're calling someone in your Favorites list, follow these steps:. Here's how:. The icons in the status bar at the top of the screen show the signal strength of your two carriers.
Learn what the status icons mean. You can see more status icons when you open Control Center. One number at a time can use cellular data. To change which number uses cellular data, follow these steps:. If you change your mind later, you can change your labels by going to Settings, tapping either Cellular or Mobile Data, and then tapping the number whose label you want to change. Then tap Cellular Plan Label and select a new label or enter a custom label.
Choose a number to use when you call or send a message to someone who isn't in your Contacts app. With iOS 13 and later, you can choose either or both numbers. On this screen, choose a number to be your default, or you can choose which number is to be used only for cellular data. Your other number will be your default. If you want your iPhone to use cellular data from both plans, depending on coverage and availability, turn on Allow Cellular Data Switching. When you call one of your contacts, you don't need to choose which number to use every time.
By default, your iPhone uses the same number that you used the last time you called that contact. If you haven't called that contact, your iPhone uses your default number. You can also specify which number to use for your calls with a contact.
Follow these steps:. With iOS 13 and later, when you're on a call, if the carrier for your other phone number supports Wi-Fi calling, you can answer incoming calls on your other number. When you're on a call using a line that isn't your designated line for cellular data, you need to turn on Allow Cellular Data Switching to receive calls from your other line.
Check with your carrier for Wi-Fi calling availability and find out whether additional fees or data usage applies from your data provider. If you're on a call and your other line shows No Service, either your carrier doesn't support Wi-Fi calling or you don't have Wi-Fi calling turned on. When you're on a call, an incoming call on your other phone number will go to voicemail if you set up voicemail with your carrier.
Call Waiting works for incoming calls on the same phone number. To avoid missing an important call, you can turn on call forwarding and forward all calls from one number to the other.
Check with your carrier for availability and to find out whether additional fees apply. You can switch phone numbers before you make a call. If you're calling someone in your Favorites list, follow these steps:. Here's how. The icons in the status bar at the top of the screen show the signal strength of your two carriers. Learn what the status icons mean. You can see more status icons when you open Control Center.
One number at a time can use cellular data. To change which number uses cellular data, follow these steps:. If you turn on Allow Cellular Data Switching, then while you're on a voice call on your voice-only number, that number automatically switches to use voice and data. If you turn off Allow Cellular Data Switching and you're active on a voice number that isn't your designated cellular-data number, then cellular data won't work while you're on the call.
How can you use Dual SIM? I can understand this. This must also mean though, that when you are on a call on sim 1, data transmission will also stop on sim 2 for the duration of the call on sim 1. And how does it work out load balancing eg data on both sims? You must log in or sign up to reply here.
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