WUMR (106.1 FM, "Rumba 106.1") is a commercial Spanish contemporary hit radio station that is licensed to serve Philadelphia, Pennsylvania, and is owned by iHeartMedia.

The station commenced operations at 5 pm on November 11, 1959, with the WQAL call sign, owned by George Voron, whose company provided businesses with "piped-in music".

[4] After playing "The Star-Spangled Banner" as performed by Henry Mancini and a message from Dave Custis—in charge of the station's format—the first song was "The Carousel Waltz" by Percy Faith.

On May 23, 1986, the station's call sign was changed to WTRK and rebranded again as "Electric 106", consulted by Mike Joseph, who had created the "Hot Hits" version of CHR for WCAU-FM (98.1) five years earlier.

[11] Former "Partridge Family" cast member Danny Bonaduce made his debut as a radio disc jockey as the station's night man around this time.

During the early 1990s, WEGX's ratings would decline slightly; in the Summer 1991 book, the station would hold a 3.7 share of the market (12+), though it would remain in the top 5 in key target demographics.

[24] At noon, after playing "Dance the Night Away" by Van Halen, WISX switched back to rhythmic adult contemporary as "Real 106-1", launching with "Summertime" by Philadelphia-based DJ Jazzy Jeff & The Fresh Prince.

[25] While "Real" had a classic hip-hop lean (to fill the void after WPHI-FM swapped frequencies with WPPZ and shifted to urban in September 2016), the station included some currents.

[26] On November 9, 2018, at noon, after playing "End of the Road" by Philadelphia group Boyz II Men, WISX began stunting with Christmas music, using the slogan "Philly's REAL Christmas Favorites"; this followed industry trade website RadioInsight reporting days earlier that iHeartMedia purchased multiple "Breeze" related domains for the station.

The change returned the format to Philadelphia for the first time since WSNI dropped it in 2006, and also positioned the station against WBEB, which had been acquired by Entercom the month prior.

[28][29] On March 8, 2022, at midnight, after playing "Scenes from an Italian Restaurant" by Billy Joel,[30] WISX dropped its soft AC format and began stunting with a temporary simulcast of Top 40/CHR-formatted sister station WIOQ.

At the promised time, WISX flipped to Spanish-language contemporary hits as "Rumba 106.1",[31] with "Mi Niña" by Wisin, Myke Towers and Los Legendarios being the first song played.