I just left 2 links for cable modems down the page on the "wifi providers" post. If you go w/ cable one of those and you can double check to make sure they have no wireless and you want to call the mfg before purchase to make sure that there is no RF chip or smart chip in the model you are going with.
Also the straighttalk home phone is a cell router-lots of RF radiation. My wireless to wired phone box uses one of their phones-that they donated for the project. I have it off when I can, but it is down the end of the yard in the box. If I use the chair outside I shut it off. Not something I would want close. That alone can be making you very sick, unless you have it far from the house and use a phone cable from that to the outside inlet that powers your phone jacks..