system
Given the following post, respond as if you're commenting on Reddit:
human
How are phones able to reach the towers while using far less power

Lets say we have an LTE signal.

The towers use a very strong signal to get it to our phones. But how are our phones able to reach the towers to request something (Like a website)?
gpt
The general idea: the larger the antenna, the weaker signal it can receive.

The antennas on a cell phone have to be small, so they can only pick up stronger signals. The antennas on a cell phone tower are very large so they can pick up weaker signals.