In 1935, the two operators agreed to merge with each department store having representation on the new board of directors.
The new call-sign became WFIL, a combination of the two previous identifiers (the fact that the new call letters were close to a phonetic spelling of "Philadelphia" was merely a happy coincidence). The new WFIL was an affiliate of NBC; some sources say the station never became established as either a "basic Red" or "basic Blue" outlet, but at least one early WFIL advertisement claimed that it was a "basic Blue" station. Westinghouse's KYW had replaced WFI-WLIT as the NBC primary for Philadelphia when it moved in from Chicago, Illinois a few years before.