Ok,

I've checked out this: https://beta.gis.geek.nz

And according to that the closest tower has a 700MHz transmitter however I an skeptical given that the closest towers are: Spark NAENAE INDUSTRIAL and Spark AVALON, both which apparently have 700MHz, however on my iPhone 6s which supports the said frequency is stuck on one 'dot' which tells me that it is using 1800MHz given that 700MHz would provide greater coverage. Anyone confirm whether the map is out of date/incorrect or whether it is just an issue with my phone. My main focus is the fact that since it is just me I can save a few dollars moving from fibre to wireless broadband.