Call Quality

The HTC One M9 is loud and clear when it comes to calls: there are no issues with hearing your contacts in the earpiece, and voices on the other end of the line also sound clear.

The iPhone 6 Plus, on its part, is a bit quieter, but not to the point for this to be an issue: it’s also pleasingly clear on both ends of the line. Bottomline is that calls on both devices sound crisp and clear.


The HTC One M9 comes with a sealed 2840mAh battery, while the iPhone 6 Plus sports a 2915mAh battery pack.

Battery size alone, however, is not a good measure of battery life, as so many different pieces come to play in actual usage. That’s why we turn to our battery test that puts phones through some tough non-stop usage with displays pre-calibrated at the same 200 nits, a comfortable brightness level for indoor use.

Our battery life test on the HTC One M9 yields a result of 6 hours and 25 minutes for non-stop use, while the iPhone 6 Plus ranks just a bit higher at 6 hours and 32 minutes.

These practically equal results show what the phones last under pressure, but do keep in mind that effective stand-by goes a long way as well, and our personal usage shows that the iPhone 6 Plus in particular can last a very long time when used little. In real-life use, we had no issues getting through a day of regular use on the One M9, but not much more, while the iPhone 6 Plus does border on the two-day regimen.

Battery life (hours) Higher is better
HTC One M9 6h 25 min (Poor)
Apple iPhone 6 Plus 6h 32 min (Average)
Charging time (minutes) Lower is better
HTC One M9 106
Apple iPhone 6 Plus 171


Looking at the big picture, one thing is certain: both the HTC One M9 and Apple iPhone 6 Plus are two devices built with exceptional care to their looks and style, and both deliver in that aspect.

Where the two differ is first and foremost in platform: iOS offers simplicity, but little customization options, while Android 5.0 Lollipop with HTC Sense offers all the customization in the world, but its app ecosystem does not get as many hot new titles (especially games). Screen size is also very different: 5 inches on the M9 versus 5.5” on the iPhone 6 Plus.

Under the hood, the Snapdragon 810 and Apple A8 are different, but performance is smooth on both devices. The bigger difference is in cameras: the iPhone 6 Plus manages to shoot consistently better images in various conditions, while the One M9’s camera does well in plentiful light, but struggles in low light. The selfie game of the M9, however, is top notch, while iPhone selfies look decidedly low-res. Battery life also seems to be a bit better on the iPhone 6 Plus, while the One M9 has stellar BoomSound front speakers.

All in all, the iPhone 6 Plus does tend to have a slight advantage in many aspects, but it also comes with a $100 price premium. If you are ready to spend a bit more, though, the iPhone 6 Plus seems like the better choice overall.

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