Samsung Wafer SCH-R510 (Alltel)

Pros: Nice LCD screen and average features

Cons: Callers on the other end hear an echo of themselves. Does not happen with hands free earpiece and echo is reduced by lowing the volume.

Summary: The mic on this phone can pick up the sound from the speaker and that is why the caller hears and echo of themselves. You can mute the phone and the callers don't get an echo or when you use the hands free device. This is my third phone and they say, Oh! it's the software they said, we will give you a new phone with updated software. BullSh*t. Bad design is what it is. They say after the 3rd return, they can let me have a different model phone if I pay retail for it minus the $99 I paid for this one. Stay away from this phone please.