I always assumed that Whatsapp keeps the logs of call / messaging (i.e who texted to whom, how many times etc), however according to the this document, it does not keep them. Moreover, it does not share neither group information nor contacts. If this is really the case, it is quite better than most people think. I just wonder, though, why do they need to keep EU out of this latest ToS update and what does Whatsapp share with Facebook?