As Chinese stores are beginning to get the new generation of Lumia devices in tiny, tiny trickles, consumers who are lucky enough to secure a phone or two in the extremely limited supply have found a pleasant surprise: the phones are coming with a much called for feature, which is call & SMS blocker.
The stealing and selling of private information has always been a big problem in China. It's developed into a full fledged industry. Occasionally even employees of ISPs, mobile carriers and banks are caught selling their customer information in bulks. What follows immediately is spamming, quite precisely targeted, coming through all sorts of channels in bulks.