A group of US advocacy groups, in a press call on Monday, reiterated that the Federal Communications Commission (FCC) needs to prohibit mobile phone carriers from blocking political text messages. Public Knowledge, Free Press, and mobile vendors like Mobile Commons had filed a complaint with the FCC last fall when when Verizon Wireless refused Naral Pro-Choice America, a women's rights group, from sending messages to people who had opted into a text-message campaign.