Don’t let Samsung fool you with the marketing hullabaloo: That Infinity-O display on the Galaxy M40 does not offer any meaningful benefit over previous M series phones with their Infinity-V displays. The notch has just turned into a camera hole that’s now placed on the left side of the screen, and the top bezel hasn’t really been reduced in size, either. The bottom bezel is smaller than the M20, M30, or the A50, but the difference isn’t high enough for it to justify having no headphone jack.
The Galaxy M40 does feel compact despite a 6.3-inch display thanks to that smaller bottom bezel, so those who have small hands and would benefit from even the slightest reduction in the overall size of their phone might like it. But the M40 is still a two-handed device, so that’s not a substantial benefit in my opinion. If Samsung had managed to fit in a 4, 000 mAh battery instead of a 3, 500 mAh battery, then my opinion would be different, but sadly that’s not the case here.