The latest version of Firefox OS lets you use two SIM cards in one device - it's like having two phones in one. This article shows you how to manage your dual SIM card settings.

View your SIM card network status

You can view the network status for each SIM card at the top of your home screen:

Choose a SIM for outgoing calls, messages and data

Tip: You can manually specify which SIM card to use each time you send a message by long-pressing on the Send button , then choosing a SIM card when prompted.

The SIM manager lets you specify which SIM to use for outgoing calls and messages:

1. Tap on the Settings gear icon on the home screen.
2. Tap on SIM manager on the Settings menu.

   

3. The SIM manager screen shows you a list of SIM cards that are currently in your phone and labels them SIM 1 and SIM 2.

   

4. Scroll down the SIM manager and select your preferred SIM for each of the following options:

   

   • Outgoing calls: Choose which SIM you'd like to use to make calls.
   • Outgoing messages: Select a SIM for sending text messages.
   • Data: Choose a SIM for connecting to the Internet, using GPS, and for sending multimedia messages or Marketplace payments.

Manage call settings for each SIM

You can customize call settings for each SIM card through the Call Settings menu:

1. Tap on the Settings gear icon on the home screen.
2. Tap on Call Settings, and then on the desired SIM: SIM 1 or SIM 2.
3. Tap on the settings you would like to change:

   

• Call waiting: This allows you to see incoming calls even when you're currently on a call.

• Fixed dialing numbers: This restricts certain calls on your SIM without a PIN. To enable this feature:
  1. Tap the button next to Fixed dialing numbers and enter a SIM PIN.
  2. Tap the Authorized numbers, and then the + sign in the upper right corner of the screen.
  3. Enter the name and phone numbers for the calls you want to restrict, and then tap Done to finish each entry.

• Call forwarding: This redirects calls to another number. Just tap the setting you'd like to change and enter the phone number to which you'd like Firefox OS to forward your calls.
  1. Always forward: Enabling this will forward all calls regardless of whether your line is available or not.
  2. Forward when busy: Enable this if you'd like your calls forwarded while your line is busy.
  3. Forward when unanswered: Enable this if you'd like unanswered calls to go to another number.
  4. Forward when unreachable: Enable this if you'd like your calls forwarded if your line is out of the area coverage.

Close the app when you've made your selections. Your changes will be saved automatically.