You will find the first jammer at Los Santos International Airport on top of a radio tower.
This jammer is located on top of the Miriam Turner Overpass bridge located at the port of Los Santos near Elysian Island.
You find the jammer on to of the entrance of Maze Bank Arena in La Puerta, Los Santos.
The jammer is located in Cypress Flats industrial estate. You can find the jammer on top of one of the factories.
The jammer is on the boat which is docked at the terminal. The boat says 'Safety First' and the jammer is in between the words.
The jammer is on one of the water tanks at El Burro Heights.
The jammer can be found at La Mesa beside Elysian Fields Freeway on top of a building on the vents.
Jammer is on the billboard on Supply St, La Mesa.
You can find the jammer on top of the Central Los Santos hospital in Strawberry.
You can find the jammer on top of the Hookah Palace located in Pillbox Hill. The jammer is on the 'Hookah Palace' sign itself.
It is located on top of the Arcadius office in Pillbox Hill.
The jammer is at Vespucci Helipad located at Shank Street in La Puerta.
The jammer is on one of the two Ferris Wheels at Del Perro Piers.
You can find this jammer on top of the Clock Tower Building located on San Andreas Avenue in Del Perro, Los Santos.
On top of one of the buildings in Del Perro. It will be attached on the vent.
The jammer will be inside one of the domes found on the rooftops of GWC and Golfing Society.
You can find the jammer on a crane located in West Vinewood. It will be on the operator section.
This jammer is on a dome of a building located in Burton.
You can find the jammer on top of the Oriental Theater. However, it is not in dead center of the theater but on the left side of the building.
On top of a building having a very sharp pillar located in Hawick.
The jammer is on top of Vinewood Bowl amphitheater located in Vinewood Hills in Los Santos beneath the Vinewood Sign.
The jammer is on the wall of Land Act Damn located near Los Santos River. The jammer is on the wall in between the long windows.
You can find this jammer on the wall of NOOSE headquarters located deep inside Palomino Highlands east of San Andreas.
This jammer is on the front entrance sign of Bishop's Chicken located at Tataviam Truckstop, Tataviam Mountains, Los Santos County.
You can find the jammer on the higher chimney of the Palmer-Taylor Power Station located in Los Santos County along Senora Way just east of the Ron Alternates Wind Farm.
The jammer is on the side of one of the stopped wind turbines at Ron Alternates Wind Farm.
It is one top of a tower of a factory located at Grand Senora Desert.
The jammer is on top of a signal tower near Galileo Park.
The jammer is on a monument located right in front of the Galileo Observatory.
The jammer is on top of Kortz Center located on Kortz Drive in Pacific Bluffs, northwest of Los Santos.
The jammer is on the overpass which is located on Great Ocean Highway in Banham Canyon.
The jammer is on the tower of The Marlowe Vineyards (also called Marlowe Valley) located at Buen Vino Road in the Tongva Hills of northern Los Santos County, San Andreas.
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On the wall of Hill Valley Church located in Great Chaparral.
On a signal tower located in Grand Senora Desert.
The jammer is on top of one of the buildings inside of Bolingbroke Penitentiary. The jammer is on the side of a venting system. It is advised that you call Lester and request the ability called 'Cops turn blind eye' since entering the penitentiary will raise your wanted level.
The jammer is on the front entrance of You Tool which can be found on Senora Freeway in the Grand Senora Desert, Blaine County.
The jammer is at the Humane Labs and Research located on Chianski Passage, deep in the San Chianski Mountain Range in Blaine County.
On top of a factory building located in San Chianski Mountain Range.
On top of a radio signal tower located in Sandy Shores.
The jammer is sitting on top of a small hut at the end of a pier located at Alamo Sea.
You can find the jammer on the Aerial Tramway terminal station at the top of Mount Chiliad.
You can find the jammer on top of a water tank located at Grapeseed. The tank reads Los Santos Department of Water & Power.
On the chimney of a house located near the Mount Gordo lighthouse located on the east coast of San Andreas.
On top of a signal tower located at Mount Gordo.
On the rocket which is outside of Up-N-Atom restaurant located at Procopio Truck Stop, Great Ocean Highway, Procopio Beach in Blaine County.
On the wall of a factory located in San Andreas area.
The jammer is on the The Cassidy Creek Bridge located in Raton Canyon, Blaine County, San Andreas.
On top of a signal tower located at Chiliad Mountain State Wilderness.
It is on the Hookies seafood diner sign located on the Great Ocean Highway in North Chumash in Blaine County.
You can find the last jammer at Fort Zancudo, it'll be on a control tower.
After you've destroyed all the signal jammers Lester will send you a message related to Avi. You will also get $50,000 and a notification stating that Avi Schwartzman has been unlocked to be used as a casino heist crew member.
When you enter your arcade shop, you will get a notification on the bottom left corner of your screen, right above the mini-map, stating that Avi Schwartzman has been unlocked.
After that, once you go into your arcade basement and access the prep board, you will be able to see Avi Schwartzman as one of the hackers that you are able to select for your casino heist.
Enjoy finding all the Signal Jammers.
No, you don't need an Arcade to find all the Signal Jammers. However, after you unlock Avi, you can only choose him as a hacker for the Casino Heist. Therefore, you need an Arcade to choose him as a hacker for the heists. But unlocking him by destroying the Signal Jammers doesn't require you to have the arcade.
