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# 2.0 Why can't a courier use an iOS 11 phone to work?

The courier will not be able to work on iOS 11, since the version of iOS 12 is required to display the new version of the maps in the courier application. You need to update your operating system version or use another phone that supports iOS 12 to work.   

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Link to this article: ** [here](https://dots.crisp.help/en/article/why-cant-a-courier-use-an-ios-11-phone-to-work-11b8ax7/) **