Of late, the number of spam SMS (and pesky calls) is on the rise. It was quiet for quite a while, but the noise has started to grow once again. When I recently received 2 SMS in the middle of the night around 1.30am, that's sign that the bad times are back. On an average I'm receiving at least one SMS a day now, and one call once in 2/3 days.
Are you seeing the same?
Not sure how much the National Do Not Call (http://ndnc.in) registry is helping.