The FCC seeks comment on multiple petitions for rulemaking and petitions for declaratory rulings dating back to 2005 regarding the proper use of signal boosters on Part 22, 24, 27, and 90 licenses. Although signal boosters and other amplification techniques can expand wireless services to the benefit of consumers, wireless operators, and first responders, improper installation and use of these devices can interfere with other carriers’ network operations and cause harmful interference. Comments and replies regarding the petitions are due February 5 and February 22, respectively.