Change Which Number Uses Data on a Dual SIM iPhone

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Follow these steps to change which number uses data on your dual SIM iPhone. Only one number at a time can use data. This means, if you are on a call with a line that you have designated as voice-only, your data will not work. You can turn on Cellular Data Switching. This feature automatically turns on the data of the line you are using during a call. If one of the lines does not have data, we recommend turning this feature off, to avoid pay-per-use data charges.

 

  1. Go to Settings > Cellular.

    iPhone Settings with red box.png

  1. Tap Cellular Data.

    iPhone Cellular - Cellular Data.png
  1. Tap that number to use cellular data.

    Cellular Data Number.jpg

Turn on or off Cellular Data Switching

  1. Go to Settings > Cellular.

    iPhone Settings with red box.png

  1. Tap Cellular Data.


  2. iPhone Cellular - Cellular Data.png
  1. Turn on or off Cellular Data Switching.

    Cellular Data Switching - switch.jpg
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