Warrantless Phone Searches Remain Legal Gray Area in 2026

Experts say passcodes still offer better protection than biometrics, but the law continues to evolve.

Mar. 31, 2026 at 2:34pm

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A highly detailed, glowing 3D illustration of the internal components of a smartphone, with neon cyan and magenta lights illuminating the circuitry and hardware, conveying the vulnerability of digital privacy in the face of expanding government surveillance powers.As the government's digital surveillance arsenal grows, the legal protections for personal phone data remain in flux, leaving citizens uncertain about the best ways to safeguard their privacy.Today in Miami

As US authorities become more aggressive about detaining and seizing smartphones, the legal landscape around warrantless phone searches remains murky. While some courts have ruled that forcing suspects to unlock phones with biometrics does not violate the Fifth Amendment, other rulings have gone the opposite way. Experts say the law is highly dependent on jurisdiction, and the Supreme Court has yet to set a nationwide standard, especially at US borders where different laws apply.

Why it matters

The uncertainty around phone searches means citizens must remain vigilant about protecting their digital privacy, as law enforcement agencies continue to expand their surveillance capabilities. Without clear legal guidelines, there are concerns that constitutional rights could be violated through aggressive tactics and the use of advanced phone-cracking tools.

The details

Last year, legal experts advised using passcodes over biometrics to lock phones, as the courts were unsettled on whether the Fifth Amendment protections against self-incrimination applied to fingerprint or facial scans. That advice still stands, as recent rulings have gone both ways on the issue. For example, the 9th Circuit Court of Appeals ruled in 2024 that forcing a suspect to use a thumbprint to unlock a phone does not violate the Fifth Amendment, while the DC Circuit Court reached the opposite conclusion in 2025. Meanwhile, immigration authorities have been using tools from companies like Cellebrite to remotely access the contents of seized phones, raising new legal concerns.

  • In 2024, the US Court of Appeals for the 9th Circuit ruled that forcing a suspect to unlock a phone with a thumbprint does not violate the Fifth Amendment.
  • In 2025, the US Court of Appeals for the DC Circuit ruled that forcing a suspect to unlock a phone with a biometric is tantamount to self-incrimination and violates the Fifth Amendment.

The players

Ignacio Alvarez

A former law enforcement executive with the Miami-Dade Sheriff's Office who is currently a managing partner at the ALGO law firm, specializing in civil and criminal litigation.

Joseph Rosenbaum

A New York-based attorney specializing in cybersecurity, privacy, and data protection at Rimon Law.

Kabbas Azhar

An Equal Justice Works Fellow at the Electronic Privacy Information Center (EPIC).

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What they’re saying

“Biometrics are a more unsettled area of the law because [relatively speaking], devices are just starting to use biometrics.”

— Ignacio Alvarez, Managing Partner, ALGO Law Firm

“In US v. Payne (2024), the Ninth Circuit held the government could require a suspect to use a thumbprint to unlock a phone without violating the Fifth Amendment.”

— Joseph Rosenbaum, Attorney, Rimon Law

“But [after you interviewed me], the US Court of Appeals for the DC Circuit held [in US v. Jeffrey Brown] exactly the opposite, reasoning that requiring a suspect to demonstrate which biometric unlocked the phone is tantamount to communicating the individual's knowledge of control or ownership, accessing potentially incriminating contents and [subsequently] suppressed the evidence presented by law enforcement.”

— Joseph Rosenbaum, Attorney, Rimon Law

“These are all things that we're fighting against because they can't possibly be constitutional. They [the US] say it is, which means it either has to be litigated or Congress has to pass a law.”

— Kabbas Azhar, Equal Justice Works Fellow, EPIC

“whether ICE or other federal agencies care [about the law] is a different question.”

— Kabbas Azhar, Equal Justice Works Fellow, EPIC

What’s next

The Supreme Court has yet to consider a ruling that sets a nationwide standard for warrantless phone searches, especially at US borders where different laws apply. Legal experts say the uncertainty will likely continue until the high court or Congress steps in to provide clearer guidance.

The takeaway

With the law around warrantless phone searches remaining in flux, citizens must remain vigilant about protecting their digital privacy. Using a passcode instead of biometrics to lock phones is still the recommended approach, but even that may not be enough to prevent determined law enforcement agencies from accessing the contents of seized devices.