In the Unpaid Tab mission of Borderlands, not only will you reunite with one of the protagonists of Borderlands 3, Zane, you’ll also be introduced to a rather peculiar Jamming Device that needs to be destroyed as part of the mission. However, the game doesn’t exactly make it clear about how to destroy it, as none of your guns or explosives are effective.
Destroy Jamming Device In Unpaid Tab Guide

Perform a ground slam on the jamming device to destroy it. You execute a ground slam in Borderlands 4 by pressing and holding Circle on the DualSense controller, B on the Xbox Controller, and Ctrl on the Keyboard while in the air. Doing anything else outside of this does not damage or destroy the structure, so do not waste your bullets, grenades, and abilities on the structure.
Climb up the platform beside the device structure. Use your Grappling Hook to get on top of it. Once above, carefully position yourself on the edge of the platform from where you can see the device. Then, perform the ground slam, ensuring you land exactly on the top of the jammer. This destroys the jammer and progresses the quest.
What Happens After You Destroy The Jamming Device in Borderlands 4

Right after you destroy the Jamming Device, you’ll have to take out hordes of Rippers attacking the compound in search of Zane and Quent. You reach the lower compounds and meet Zane from Borderlands 3, helping him rescue Quent and take out the Rippers.
You then go on to help Zane take out the Driller Hole inside the Ripping Room, introducing you to the finale of this mission. Here, you are presented with two choices. You can either help Zane and save Quent or let him die; except for dialogue at the end of the quest, the rewards and story progression remain the same for either of the two choices.
Borderlands 4 is full of missions where you’ll encounter vague puzzles. So, we have some handy guides for a few of them, like finding another way in the Mob Mentality mission or removing the door armor in One Fell Swoop.

