Thank you for this question. Easy answer is that WIFI
very rarely uses a cell tower. The more complicated answer is that there are wireless internet providers that provide wireless internet services using antennas placed on towers, but they aren't WIFI. You could install amplified WIFI antennas on cell towers but it is rarely done.
Further complicating the issue is that a cell phone may use WIFI to connect to the traditional switch network for calls and data. But this WIFI would be connected to your home WIFI router or a WIFI router in a coffee shop or the like.