You can unlock a new radio station called 'Still Slipping' by completing this collectible side mission in GTA Online.
The "collection" in this context means repairing these radio antennas.
Although this side free roam activity was added as part of the Cayo Perico heist update, completing this side quest is optional and does not affect your heist in any way.
How To Start
To begin, you must visit Mirror Park and look for a yellow "J?" icon on the map. This icon will be in Mirror Park. You do not see the J icon in the image below as it disappeared for us as soon as we approached it, followed by a message from Joy.
You need to approach the marked location, and after which Joy will send you a message about the antennas.
Note if you do not go to Mirror Park, you won't be able to interact with the radio antennas to fix them. Below, we have the locations of all the radio antennas that you can find. You can repair these antennas in any order.
Antenna 1 - Cypress Flats
The first antenna is found on top of one of the buildings at Cypress Flats. This location is possibly a gang-infested area with a large red circle, so be careful not to start a gang fight here accidentally.
Antenna 2 - San Andreas
You can find the second antenna on top of a building overlooking the Vespucci Beach at Goma Street in San Andreas.
