WRAL's demonstration of the problem. The top screen shows the over-the-air feed for the station. The bottom screen shows what happens when a Verizon customer gets a text message in the same room as the set-top box (see below for full clip).

Verizon LTE Phones & Time Warner Cable Set-Top Boxes Are Not Playing Nicely With Each Other

Some Time Warner Cable customers in Raleigh, NC, who also have Verizon Wireless phone service have noticed that whenever they get an e-mail, text, or otherwise use their phone, the TV signal can go squirrely on them. This is apparently what can happen when a cable company broadcasts channels on the same broadband spectrum used by wireless service. [More]