my iphone has no audio on speaker phone

does it have audio if you connect a headset?

My IPhone 4S developed the same problem today. You cann hear via the internal speaker and using the headset plugged in but the speaker for ringtones and alerts does not work.

Check to be sure you don't have any debris in your headphone jack. Try blowing on it with compressed (canned) air and quickly inserting/removing your headset multiple times to dislodge it.

Thanks for the suggestion. Tried using canned air to clean out the headphone jack, and both speakers as well as the docking connector. Tried powering off and back on then did the complete hard. Reset. Nothing helped. Apple now says looks like a hardware failure.

You're welcome. Back up the phone and make an appointment with the genius bar at a nearby Apple store. If your phone is under warranty and hasn't been damaged or jailbroken they will probably replace it. (You can check your warranty status here https://selfsolve.apple.com/agreementWarrantyDynamic.do.

yeah mine does but when i take it out i dont

I have tried blowing in it w canned air, no solution