Hi @jojovelez7! Welcome to community and thanks for posting.
I think you mean SD card, as a SIM card is used to activate your mobile phone. If you need help activating a mobile device or have questions around SIM cards, I would recommend contacting your mobile provider for further help.
If you're using an Android, make sure the app is installed to the phone's local memory, rather than on an SD card. (Installing the Pandora app on an SD card causes performance issues we can't provide support for.)
For more information on how Pandora works on mobile devices check out these resources from our Help Page:
How to use Pandora from an iOS device
How to use Pandora from an Android device
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