Do these headphones need a phone for FM radio?

No. The FM radio is built into the headphones, so you can listen without pairing a phone. Reception still depends on signal strength where you are.

How does the noise canceling compare with premium headphones?

It reduces steady background noise like engine hum, but it is not as deep or as quiet as flagship over-ear models. Expect a useful reduction, not silence.

Are these over-ear or on-ear?

They are on-ear: the pads rest on the ears rather than around them. That makes them lighter and more portable, but they clamp on the ears over long sessions.

Can I take calls with them?

Yes. A built-in microphone handles calls and voice chats over Bluetooth. Call quality is fine for everyday use, not studio-grade.

What is the surround-sound mode for?

It widens the soundstage for movies, games and some music. It is a processing effect, so it adds space rather than accuracy.

Do they work with any Bluetooth phone?

Yes. They pair over standard Bluetooth with Android and iOS phones, tablets and computers. The 32-ohm impedance also makes them easy to drive from weaker sources.