The FBI successfully recovered private Signal messages from a defendant’s iPhone even after the app was deleted. Learn how this security loophole works and the simple setting you must change today to keep your chats private.
Most of us prefer using the Signal app because it is supposed to be very secure with a remarkable end-to-end encryption system that hides our chats from everyone else. It also has a message-disappearing feature to help us set a message deletion time.
But the Federal Bureau of Investigation (FBI) found a way to read private Signal messages on an iPhone, even after the app was deleted. This was revealed in a court case in Texas that these messages can stay hidden in the phone’s memory longer than we expected.
How the loophole works
The case involves a woman named Lynette Sharp and an attack on a Texas detention centre in July 2025. During the trial in April 2026, the FBI revealed they recovered her messages even when she had deleted the Signal app. The bureau, reportedly, retrieved the messages from the iPhone’s push notification database.
During the trial, FBI Special Agent Clark Wiethorn explained how investigators accessed the evidence. When a message arrives, the phone shows a little preview on the screen, which is handled by the phone’s operating system and not the Signal app.
Even if Signal deletes the message later, the phone’s system can save a copy of that preview in its own records. To read these saved messages from Signal, the FBI used Cellebrite, a forensic tool often used by law enforcement to scan seized devices.
A key finding is that the FBI could only see incoming messages, not the ones Sharp sent, which confirms the data came from the notification storage. It shows that while the app’s encryption is strong, the phone’s operating system keeps its own logs of everything.
Hellbound and Down 