Can Border Agents Search Your Phone?

Nov 5

Nov 5, 2026 · Brooke Watson | Dynamis LLP

Can border agents search your phone at an international airport without a warrant? Generally, yes: every federal appeals court to decide the question has allowed at least routine manual searches without individualized suspicion, but the rules for forensic examinations and the permissible scope of a search vary by circuit.

You just got off an international flight. You were pulled into secondary inspection. An officer asked for your phone and passcode, then walked away with the device.

If that happened to you, or to a client, employee, or family member, you are not alone. U.S. Customs and Border Protection reports 47,047 electronic-device searches in fiscal year 2024, including 42,725 basic searches and 4,322 advanced searches.

As a former federal prosecutor in Miami, I have worked on the government's side of federal investigations. The border-search exception gives the government broad authority, but that authority is not identical everywhere: the Eleventh Circuit permits suspicionless forensic border searches, while the Ninth Circuit requires reasonable suspicion of digital contraband. (United States v. Touset, Cano)

New York and Virginia received important appellate rulings this year, and Massachusetts follows its own line of precedent. (Alisigwe, United States v. Belmonte Cardozo, Alasaad v. Mayorkas) For a traveler deciding what sensitive information to carry, those differences matter.

Why border agents can search your phone without a warrant

The Fourth Amendment generally requires police to obtain a warrant before searching the digital contents of a phone seized incident to arrest; that was the Supreme Court's holding in Riley v. California in 2014. Riley did not decide border searches, and courts have treated the border-search exception as a separate basis for warrantless inspection. (Alisigwe)

The border includes an international airport functioning as the equivalent of a border, not just a land crossing. (Alisigwe) CBP's border-search authority also extends to outbound travel, so your phone may be searched when you leave the country. (CBP Directive 3340-049B §§ 2.3, 4.2)

The rules compared here are federal: the Constitution as interpreted by the governing federal circuit, together with agency policy. (Directive § 2.9) Do not assume that a state's reputation for strong privacy protections impacts what federal officers may do at its airports.

CBP's current directive, 3340-049B, took effect January 1, 2026 and replaced the 2018 directive. It draws a distinction between basic and advanced searches:

Basic search: Any border search that does not qualify as advanced, generally involving manual review of information on the device; CBP policy permits basic searches with or without suspicion, subject to applicable law and the directive's limitations. (§§ 3.3, 5.1.3)
Advanced search: A search using connected equipment, wired or wireless, to copy or analyze the device's contents; CBP generally requires reasonable suspicion of activity violating a law it enforces or administers, or a national-security concern, plus supervisory approval. (§§ 3.4, 5.1.4)

There are important qualifications: equipment used merely to unlock a device does not itself make the search advanced, and neither does documenting information observed during a basic search. (§§ 3.3–3.4) Copying solely to segregate privileged material also does not convert a basic search into an advanced search under the policy. (§ 5.2.1.2)

Those are policy classifications, not a way around binding constitutional precedent. (§ 2.9) The directive also states that it creates no private rights, privileges, or benefits, and it governs CBP rather than every federal agency exercising border-search authority; ICE and Homeland Security Investigations have their own policies. (§§ 2.8, 8.1)

What it means when CBP "images" your phone

Imaging generally refers to creating a forensic copy for examination, potentially away from the airport; a forensic search can reach deleted files, cached fragments, location histories, system logs, and metadata that are not apparent from ordinary scrolling. (Belmonte Cardozo) But an advanced search does not have to produce a complete image, because CBP's definition covers equipment-assisted copying or analysis more broadly. (Directive § 3.4)

The Fourth Circuit explained the distinction this summer: "In a forensic search, an officer connects the device to outside hardware or software, copies its contents and analyzes the copy." (Belmonte Cardozo) That is a different kind of exposure from an officer reviewing the screen. A manual search is not capped at a set number of minutes; the court said it "ends when the officer's time, patience and attention give out," while cautioning that lengthy manual searches that deprive a person of a phone for extended periods could bring other Fourth Amendment principles into play. (Belmonte Cardozo)

The practical lesson is to think beyond the messages you remember sending. Consider photographs, documents, location information, confidential business material, and anything else you have chosen to keep on the device.

In Malik v. U.S. Department of Homeland Security, agents detained a lawyer's locked phone at Dallas, sent it to a forensic lab, bypassed its security, and extracted its data. The technical work took about three months, followed by roughly two months of privilege screening before the phone was returned. (Malik)

Retention is a separate issue. CBP generally must discard copies within 21 calendar days after the search concludes unless a listed retention ground applies, but those grounds include certain immigration, customs, and other enforcement information retained without probable cause, as well as probable-cause and discovery-related grounds. (Directive § 5.6)

The 21-day provision is not a general deletion guarantee. CBP's public explanation says information retained in its Automated Targeting System may remain for up to 15 years, with certain active law-enforcement records accessible for the life of the activity. (CBP retention FAQ)

When do border agents need reasonable suspicion? It depends where you land

The principal circuit split concerns forensic examinations and the permissible purpose of a border search, not whether officers can ever review a phone without a warrant. (Alisigwe, Cano) The table below summarizes constitutional precedent, not every requirement of CBP policy.

State and major ports	Federal circuit	Routine manual search	Forensic examination
Florida: MIA, FLL, MCO	Eleventh	No suspicion required. (Touset)	No suspicion required under circuit precedent. (Touset, Pulido)
New York: JFK	Second	No suspicion required. (Alisigwe)	Whether sophisticated forensic searches require individualized suspicion remains open. (Alisigwe)
California: LAX, SFO	Ninth	No suspicion required, but the search must be limited to digital contraband. (Cano)	Reasonable suspicion that the device contains digital contraband required. (Cano)
Texas: DFW, IAH, land ports	Fifth	No suspicion required. (Castillo)	The constitutional suspicion threshold remains unresolved. (Castillo, Malik)
Massachusetts: BOS	First	No reasonable suspicion required. (Alasaad)	No warrant or probable cause required; whether the Constitution independently requires reasonable suspicion was not resolved. (Alasaad)

Florida

The Eleventh Circuit gives the government broad latitude: in Touset, it held that "the Fourth Amendment does not require any suspicion for forensic searches of electronic devices at the border." In April 2025, Pulido applied that rule, calling the result "an easy affirmance" and rejecting the argument that the border exception permits only a search for contraband rather than private messages containing evidence.

In Miami, Orlando, and Fort Lauderdale, binding circuit precedent therefore imposes no individualized-suspicion requirement on forensic border searches. (Touset, Pulido) CBP's own policy still imposes conditions on searches classified as advanced. (Directive § 5.1.4)

New York

Some New York district judges had required warrants for border-phone searches, but on September 17, 2026, the Second Circuit rejected that approach in United States v. Alisigwe: "Those decisions are wrong." Judge Menashi's majority opinion held that the manual searches at issue required neither a warrant nor individualized suspicion. (Alisigwe)

The court left sophisticated forensic searches for another day, observing that the issue "may often lack practical significance because a suspicionless manual search might establish reasonable suspicion for a forensic search." (Alisigwe) Judge Eunice Lee concurred only in the judgment and disagreed with treating cellphone searches as routine, suspicionless inspections. (Alisigwe)

California

The Ninth Circuit is among the most protective: Cotterman requires reasonable suspicion for a comprehensive forensic examination, and Cano limits both manual and forensic phone searches under the border exception to looking for digital contraband. A forensic search requires reasonable suspicion that the device contains that contraband, not merely evidence of another crime. (Cano)

That is a limit on what officers may search for under this warrant exception. It should not be confused with a categorical rule forbidding later use of evidence in a different prosecution. (Cano)

Texas

The Fifth Circuit permits routine manual searches without individualized suspicion, but has not settled the constitutional suspicion threshold for forensic examinations. (Castillo) In Malik, it found reasonable suspicion and did not need to decide whether the forensic search was routine or nonroutine.

In November 2025, Anibowei v. Bondi, an unpublished decision involving a Texas lawyer whose work phone had been copied at DFW, rejected his warrant argument under binding circuit precedent. His petition for Supreme Court review is pending. The government initially waived its right to respond, but the Court called for a response, now due November 30. (Supreme Court docket, No. 26-208)

Massachusetts

In Alasaad v. Mayorkas, the First Circuit held that basic border searches are routine and need not be supported by reasonable suspicion, and that neither a warrant nor probable cause is required for border searches of electronic devices. The decision did not resolve whether the Constitution independently requires reasonable suspicion for advanced searches; the challenged policies already imposed a suspicion requirement. (Alasaad)

The court also rejected a contraband-only limit, permitting searches for evidence of activity violating laws enforced or administered by CBP or ICE. (Alasaad) At Logan, CBP's policy remains an important part of the protection travelers receive.

Worth watching: Virginia and the Supreme Court

In July 2026, the Fourth Circuit held in Belmonte Cardozo, a Dulles Airport case, that routine manual cellphone searches require no individualized suspicion. Its earlier Kolsuz decision requires "some form of individualized suspicion" for forensic examinations without conclusively resolving whether reasonable suspicion is enough.

The Fourth Circuit also requires a nexus between a forensic search and the purposes of the border-search exception; a generalized interest in investigating domestic crime is not sufficient. (United States v. Aigbekaen, 943 F.3d 713 (4th Cir. 2019)) That is an important qualification to any claim that crossing the border permits an unrestricted criminal-evidence search.

Belmonte Cardozo filed a Supreme Court petition on October 27, challenging searches of travelers' cellphone contents without a warrant or individualized suspicion. (Docket, No. 26-6011, petition) Responses in his case and Anibowei's are due November 30, and the Court has not yet agreed to hear either case. (Belmonte Cardozo docket, Anibowei docket)

Do you have to unlock your phone at customs?

Agents can ask for access. CBP policy says travelers must present devices in a condition that permits inspection, and officers may detain a device they cannot inspect because of a passcode or encryption. (Directive § 5.3) The ruling in Alisigwe did not decide a Fifth Amendment compelled-unlocking claim. (Alisigwe) Do not assume the power to search settles the power to compel an answer.
They can keep the phone after you leave. Supervisory approval is required, and detention ordinarily should not exceed five calendar days absent extenuating circumstances; longer periods require additional approval, with extensions beyond 15 days approved in increments of no more than seven days. (§ 5.4.1.1) If CBP temporarily detains the device to continue its search, the officer must issue a completed Form 6051D custody receipt. (§ 5.4.1.2)
A U.S. citizen cannot be denied entry solely because CBP cannot inspect the phone. CBP may still detain the device or take other appropriate action concerning it. (CBP FAQ) Visa holders and other applicants for admission may face admissibility consequences, while returning lawful permanent residents have distinct statutory protections and generally are not treated as seeking admission unless a listed exception applies. (CBP FAQ, 8 U.S.C. § 1101(a)(13)(C))
CBP policy bars intentionally accessing cloud-only information. Officers must disable network connectivity or have the traveler do so, but information already resident on the device can fall within the search. (Directive § 5.1.2) Think about what is actually stored locally, not just where it originated.
They may keep your passcode temporarily. Policy says access information should be recorded only in a temporary format, should not be uploaded into CBP systems, and must be deleted or destroyed when no longer needed to facilitate the search. (§§ 5.3.1–5.3.2) That is different from a ban on recording it at all.
They must follow privilege procedures. Before searching files or materials over which attorney-client privilege or work-product protection has been asserted, officers must contact CBP counsel and follow segregation procedures. (§ 5.2.1) Be specific about the material and the attorney involved; the assertion does not exempt the entire phone from inspection.
They must safeguard business-confidential information. Trade secrets and commercial information receive protection against unauthorized disclosure under the directive. (§ 5.2.3) That is a handling rule, not a blanket bar to searching business data.

Tactics illustrated by reported border-phone cases

The reported cases offer concrete examples of how these searches unfold. They are illustrations, not a measure of how often any particular tactic is used.

The advance flag: In Malik, the traveler was flagged because of an apparent connection to an international arms dealer; in Alisigwe, HSI directed CBP to place a traveler into secondary inspection during an existing investigation. (Malik, Alisigwe)
Scroll and photograph: Officers in Alisigwe manually reviewed the phone and photographed what appeared on its screen rather than performing a forensic extraction. (Alisigwe) Do not assume "basic" means nothing is documented.
Manual first, forensic second: The Second Circuit expressly observed that a suspicionless manual search might establish reasonable suspicion for a later forensic examination. (Alisigwe) The initial look can therefore change what happens next.
Detain and send to the lab: Malik's locked phone was sent away for technical access and extraction, followed by privilege screening. (Malik) Leaving the airport did not end the examination.
An existing criminal investigation: Alisigwe rejects an objection based simply on a criminal-investigative motive, but the Ninth Circuit's digital-contraband rule and the Fourth Circuit's forensic-search nexus requirement impose important limits. (Alisigwe, Cano, Aigbekaen)
Questions while you wait: Routine border questioning often does not trigger Miranda warnings, but there is no blanket border exception to Miranda; custody depends on the totality of the circumstances, and interrogation must also be present. (United States v. FNU LNU, 653 F.3d 144 (2d Cir. 2011))

What to do before you travel, and at the border

Decide what to carry before you pack, not at the gate. If you do not need sensitive material on the trip, consider leaving it home or using a properly configured travel device. Think especially carefully about client files, confidential company information, wallet apps, and recovery-phrase screenshots.

If a crypto account is already frozen or involved in a subpoena or seizure, start with our guide to crypto exchange subpoenas, frozen accounts, and federal seizures. Plan with counsel rather than improvising during inspection.

Preserve information: Do not delete or wipe material to frustrate an investigation or evade preservation duties. Knowingly destroying or concealing records with the required obstructive intent can create a separate federal offense, including in contemplation of a covered federal matter. (18 U.S.C. § 1519)
Do not lie: A knowingly and willfully material false statement in a matter within federal jurisdiction can itself be a crime. (18 U.S.C. § 1001) Do not guess, invent an explanation, or mistake a polite conversation for an off-the-record one.
Flag privilege early: Identify the attorney, communications, folders, or categories at issue and ask for CBP's privilege procedures. Specific information helps officers identify the claimed material. (Directive § 5.2.1)
Know your immigration status: Citizens, visa applicants, and returning permanent residents do not stand in the same position. (CBP FAQ, 8 U.S.C. § 1101(a)(13)(C)) Get individualized advice before deciding how to respond to an access request.
Get the receipt: If CBP detains the phone to continue its search, ask for Form 6051D. (Directive § 5.4.1.2) Write down the officers' names, the time, and what you were told.
Call counsel early: If a device has been copied, do not assume its return means the data is gone. (Directive § 5.6) If you believe your crypto activity is being misread, our guide to responding to a false crypto-scam accusation offers a starting point for organizing a response.

Frequently asked questions

Can border agents search my phone without a warrant?

Generally, yes: federal appeals courts addressing routine manual searches have permitted them without a warrant or individualized suspicion. (Alisigwe) The rules for forensic examinations and the scope of a permissible border search differ by circuit, including the Ninth Circuit's digital-contraband restriction. (Cano)

Do I have to unlock my phone at customs?

CBP policy requires presenting devices in a condition that permits inspection, and officers may detain a phone they cannot access. (Directive § 5.3) CBP says a U.S. citizen will not be denied entry because the device cannot be inspected, while immigration consequences for noncitizens depend on their status and circumstances. (CBP FAQ, 8 U.S.C. § 1101(a)(13)(C))

Can CBP copy my phone?

Yes: policy generally requires reasonable suspicion or a national-security concern and supervisory approval for equipment-assisted copying or analysis classified as an advanced search. (Directive §§ 3.4, 5.1.4) Certain copying solely for privilege procedures is treated differently, and stricter constitutional circuit requirements still apply. (§§ 2.9, 5.2.1.2)

Can border agents search my cloud accounts?

CBP policy prohibits intentionally using the device to access information stored only remotely. (Directive § 5.1.2) Information already stored on the phone may fall within the search even if it originated in a cloud account. (§ 5.1.2)

How long can CBP keep my phone or its data?

For continuation of a border search, device detention ordinarily should not exceed five calendar days absent extenuating circumstances, but approved extensions are allowed. (Directive § 5.4.1.1) Data retention is separate: the 21-day period after a search ends has substantial exceptions and is not a promise that every copy will be deleted. (§ 5.6)

Before your next trip

A phone used to be something you carried. Now it carries you. Before crossing the border, think about what you actually need on it and what you would want counsel to know if it were examined.

If you or your company has had a device searched, detained, or copied at the border, or you are worried about what an upcoming trip could expose, contact me or another lawyer at Dynamis. Do not wait until you are standing in secondary inspection to begin that conversation.

Brooke Watson is a partner in the Miami office of Dynamis LLP and a former federal prosecutor in the Southern District of Florida. Her practice includes white-collar and cyber criminal matters, cryptocurrency litigation, and internal investigations. (Biography)

This post provides general information, not legal advice, and reading it does not create an attorney-client relationship. The law and policy described here are current as of November 5, 2026 and may change.

Authorities

cybercrimeDOJ cybercrime investigationcriminal defenseprivacyborder search

Brooke Watson