Best Android phone call quality wise?

Moto X or Moto G.

 

Anything by Motorola. They've been in the radio and telecomms business for 85 years and they get it right.

 

I'm in the same boat.. I've heard the M8 is great. That's where I'm headed.

 

Call quality is excellent on S5 but speaker is crap compared to M8.

 

The speaker and call quality on my Moto X is WONDERFUL. I can set my phone in the center of the dash of my car (above the radio) and have a conversation with someone using speaker.

 

The Moto X for earpiece call quality and the HTC One M8 for speaker. Both great phones, the Moto X did get slightly better reception and the HTC One seems to have better noise cancelation. I would lean towards the Moto X though if call quality is at the top of your list.

 

With the latest TMO NE6 firmware, I get great call quality with HD Voice (don't remember if I had HD voice on previous TMO firmware or not) on my Note 3. Can't wait for VoLTE in my area.

 

Moto X! Absolutely wonderful call quality. I have been complimented on it several times by different people.

 

The Moto X has pretty good voice quality according to the reviews I've gone through.

 

Uh, phone call quality has almost nothing to do with the phone itself, except for maybe how good the speaker phone is at high volume.

The carrier controls the bit rate of voice calls and these decisions are mostly made automatically to balance QoS vs other loads on the cell network.

If you want the best quality then make a video or voice call with an app that uses data, like hangouts.