system
Given the following post, respond as if you're commenting on Reddit:
human
Do larger smartphones have larger antennas and hence better wifi/cell reception?

Some engineer is probably going to cringe at this question, but it seems logical to silly old me. For example I have an iPhone 6+. Couldn't you fit a larger antenna in an iPhone 6+ than an iPhone 6? And wouldn't that make the wifi and cell service better?
gpt
Given the frequencies being used, your antenna will actually be rather small.  Improvements in reception generally occur due to different antenna designs, not by increasing the size.

For example, since a cellphone antenna is, generally, omnidirectional, you can increase the gain (the "strength" of the antenna) by making it more directional.  The upside is that the same transmitted power is better focused; the downside is that you lose reception from particular directions.

Now, one method I'd like to see are adaptive antennas.  If the phone can detect the direction of the tower it's transmitting to, the adaptive antenna could focus the beam ("beamforming") to direct the transmission in the direction of the tower.  This would lead to better use of power for the phone, and hence longer battery life.