Have any teens in your household? If you do, you may or may not be surprised to know that U.S. teens, on average, send 3,339 text messages per month. The numbers come courtesy of analytics company Nielsen who analyzed the cellular habits of over 3,000 teens in April, May, and June. The study finds the males between the age of 13 and 17 send roughly 2,539 texts per month while females send a blistering 4,050. The older, more conservative group of 18 to 24 year olds only sent an average of 1,630 text messages per month. No wonder cellular companies are charing an arm and a leg for unlimited text messaging plans. How many SMS messages are you good for every month?