Of course they would tell you that there is no limit. I would have told you the same thing if you asked me if my old van had a governor in it. No it doesn't, why would it. Ask me again a week or two later and I would tell you this: Well now that you mention it, it appears there might be a governor in it as my engine shut off with a big rumble shortly before I reached 100 mph and would not inject gas again until I coasted down to 95. (I had a good reason to be in a hurry, don't ask please).
But all this aside, I made up my mind that I do not need 3G on my PW - once they are back for sale. My wifes KT benefits from beeing able to sync anywhere - even though she uses the syncing usually when she only takes her phone instead of lugging around 2 devices. In that case the KT stays home, well in reach of the wifi there.
Now I thought that is neat especially seeing it work so flawless. I enjoy reading on eink much more than on my phone, so I took my old PRS-300 out of storage until the PW arrives. When reading on phone I have to use black background with red text (the white is too bright to read comfortably over long periods of time) - and the kindle app won't let me switch to red text. So even if I wanted to, syncing with phone and PW won't do me no good.