I am currently in the market for a sim-only phone plan, but my phone can in no way use Data. Therefore I have been hunting for any provider that still offers Data-less plans, without any luck thus far.
It's come to the point that it is taking me so long that the value of the time may outweigh the savings (though I am also looking over the edge of a sunk-cost-fallacy pit). Getting this question answered may swing me over one way or the other:
What part of a mobile plan's cost is Data, as a guideline?