The days of truly unlimited LTE data on Verizon Wireless are coming to a close. Today, the largest US carrier announced that it will begin applying its "network optimization" practices, which previously only affected the 3G network, to unlimited 4G LTE customers starting October 1st. Beginning on that date, the carrier will slow you down if you're "connected to cell sites experiencing heavy demand." But Verizon's policy is far from straightforward, and it's in no way universal. To risk slower speeds, you must also meet all of the following criteria: