1) Restart Your iPhone: Restarting your iPhone also allows for all your apps to restart all over again. This can sometimes fix the problem.
2) Troubleshoot the App: Close the app and re-open it. Double-press the Home button, which will activate the App Switcher, which allows you see all currently opened apps. Swipe up on the app to close it. Once it no longer appears in the App Switcher, it has successfully closed.
3) Make Sure The Pandora App Is Up To Date: Go to the App Store and check for any available updates.
4) Update iOS: Go to the Settings -> General -> Software Update. A message “Your software is up to date” will show if no updates are available. Install any if available.
5) Try Reinstalling: On the app icon, lightly press and hold. The iPhone will vibrate and your apps will start “wiggling.” One the upper-left hand corner of the Pandora app icon, tap the “X” and then tap on Delete when you see text saying Delete “Pandora”?
To reinstall, search up Pandora app in the search bar and reinstall.
6) Try turning off your Wi-Fi and turning it on again.
7) Try out the app with a Wi-Fi connection.
8) Your phone may need repair if these methods don’t work. You may have to see a repairman for iPhones.