You can destroy signal jammers with any weapon of your choice, and each destroyed signal jammer will earn you $2,000 and 1,000 RP.
If you destroy all 50 signal jammers, you will make a total of $150,000, including the bonus $50,000, and unlock the Avi Schwartzman character.
GTA Online All 50 Signal Jammer Locations
The northern part of the map contains 18 signal jammer locations. Here they are:
Fort Zancudo — On top of the control tower North Chumash, Blaine County — On the sign of the Hookies restaurant Chiliad Mountain State Wilderness — On the top of the radio tower over Altruist Camp Raton Canyon Bridge — On the side of the rail bridge over the Cassidy Creek Paleto Bay — On top of the Clucking Bell Farms building Procopio Truck Stop — On the rocket statue near Up-n-Atom Burger restaurant Mount Gordo — On the broadcasting tower at the peak El Gordo Lighthouse — On the chimney of the house Grapeseed Avenue — On top of the LSDWP water deposit tower Mount Chiliad — On the roof of the tramway station Alamo Sea — On the roof of the house at the north pier Sandy Shores — On top of the broadcasting tower near sheriff’s station Senora Freeway — On top of the Union Grain Supply Inc. storage silos San Chianski Mountain Range — On top of the main pipe at Humane Labs and Research Grand Senora Desert — On the You Tool sign of the shop Bolingbroke Penitentiary — On top of the roof with satellite dishes Grand Senora Desert — On the side of the broadcasting tower near Rebel Radio building Route 68, Great Chaparral — Under the roof of the Hill Valley church
The southern part of the map contains 32 signal jammer locations, most of which can be found in the Los Santos city area. Here they are:
Tongva Hills, Los Santos County — On the top of the Marlowe Vineyards building Chumash — On the side of the Great Ocean Highway footbridge Kortz Drive, Pacific Bluffs — Inside the “O” letter of the Kortz Center sign Vinewood Hills — On the side of the statue in front of the Gallileo Observatory Mount Haan Drive — On top of the red antenna north of Vinewood sign Grand Senora Desert — Inside the sign of the Stoner Cement Works building San Chianski Mountain Range — On top of a wind turbine in the south of of RON Alternates Wind Farm Senora Way — On the chimney of the Palmer-Taylor power station building Palomino Freeway — Inside the sign of the Bishop’s Chicken restaurant Palomino Highlands — Under the roof of the NOOSE Headquarters building Tataviam Mountains — On the side of the Land Act Dam building Vinewood Hills — On top of the Vinewood Bowl building Hawick, Vinewood — On top of the Badger building Downtown Vinewood — On top of the Pacific Standard Public Deposit Bank building Rockford Hills — On top of the City Hall building West Vinewood — On top of the yellow crane near Eclipse Tower West Eclipse Boulevard — Above the entrance of the Richman hotel North Rockford Drive, Morningwood — On top of the Elgin House building San Andreas Avenue, Del Perro — On top of the Clock Tower building Pleasure Pier, Del Perro Pier — In the center of the ferris wheel Puerto Del Sol, Vespucci — On top of the Vespucci helipad Pillbox Hill — On top of the Arcadius Business Center building Pillbox Hill — On the sign of the Hookah Palace building Strawberry — On the sign of the Central Los Santos Medical Center building Hawick Avenue, Hawick — On the Ban Windmills billboard on Popular Street El Burro Heights — On top of the St. Fiacre Hospital building East Los Santos — On top of the water deposit tower in Murrieta Oil Field Port of Los Santos, San Andreas — On the side of a container ship at the north terminal Cypress Flats — On top of the silo at Los Santos State Gas Company La Puerta, Los Santos — On the sign of the Maze Bank Arena building Port of Los Santos — On top of the Miriam Turner Overpass suspension bridge Los Santos, San Andreas — On top of the Los Santos International Airport control tower
Those are all signal jammer locations in GTA Online. For more GTA Online tips and tricks articles, you can visit our dedicated hub page.