The cache is not at the posted coordinates although it may be a good place to park your geomobile.
This is a three stage puzzle. Stage one can be done in the comfort of your home. Solve the jigsaw and you will be given a cipher and a key so that you can work out the coordinates to the second stage.
How to make your own pocket decoder.
When you get to stage two, you will have to employ another tool to find the third (and final) stage which is where the cache is located.
At stage two some phones will automatically detect the data. If yours doesn't, you may have to research how to temporarily enable your phone's settings for NFC.