A321
Flight Attendant Current
Communication Breakdown
Aircraft Equipment Problem Critical; Deviation / Discrepancy - Procedural Published Material / Policy; Flight Deck / Cabin / Aircraft Event Other / Unknown
Flight Crew FLC Overrode Automation; General Maintenance Action; General Flight Cancelled / Delayed
Procedure; Aircraft
Coming into ZZZ. When we get to the gate; the pilot dinged and the seatbelt sign was turned off. I made the Disarm PA. I disarm my doors when I noticed the jet bridge moving forward. I then get a call from [another Flight Attendant] at 2L/R. She tells me her pressure light is still flashing. I call the Captain and he tells me to wait on opening doors. I asked if he wanted us to rearm. He said yes. I put the strap on my door and I made the PA to rearm doors. As I am making the PA; I hear the knock and I go down and give the X. As I am giving the X; the Agent; who never even looked; just cracked the door open. I started screaming at him to stop. After about 4 minutes; the Captain calls to tell me it is safe to open the doors. I made the PA to disarm doors and I did the all call. I then opened the 1L door and yelled at the agent. His only reply was that he saw a thumbs up. I told him that not only was I giving the X with both arms but that the little red banner was across the window. He shrugged and walked back up to the podium. After we deplaned; I walked out and I told him he better [report because I was. The pilots were still on the plane; and I believe they were writing up the flashing pressure light. I went straight to my [Manager] and he advised me to fill out the report.
Flight Attendant reported Gate Agent opened main entry door despite given crossed arms sign and warning strap across window because of a pressurization warning light illuminated at the doors.