Why won't the iPhone 5 stream live radio?

I had a 4 that was stolen. While it wasn't perfect in the radio streaming department, (it cut out then without rhyme or reason would stream for longer periods), the iphone 5 is the WORST!! At most I get 4, or 7 or at most 10 minutes of content then *click* stream cut off and I have to enter passcode and reload page. It's 'Groundhog Day' in cycles of minutes. Entirely frustrating. *Does NOT happen with my iPad!! Wads of cash for an "upgrade" that cannot perform such a simple action. Help. Please.