I've enabled a trace on your account and I'd like to try a couple of troubleshooting steps.
First, let's uninstall and reinstall the Pandora app on your iPhone:* To do that:
Hold down the Pandora icon on your Home screen until all the icons start "shaking."
Then tap - in the upper left of the Pandora icon, and confirm that you want toDelete app.
Then re-install Pandora via the App Store on your device.
*Please note: Pandora Premium and Premium Family listeners may need to re-download some of their offline content after reinstalling the app. Pandora Plus users, however, should receive that offline content again automatically. If you have any trouble with your offline stations after reinstalling, please let us know.
Then, please try rebooting your connection:
Shut down your iPhone completely;
Unplug your modem and router, wait one full minute, and then plug them back in;
Wait five more minutes to allow the modem and router to fully boot back up;