How far back you can subpoena text messages depends almost entirely on where the messages live. Carriers hold the actual content of texts for only a few days, so a subpoena issued weeks after a conversation will usually come back empty on content. Carrier metadata (who texted whom, when, from which number) lasts one to seven years. Cloud backups on iCloud or Google can preserve message content for years, as long as the account is active. And a phone in someone’s pocket may hold everything from the day they got it. The realistic answer is measured in days for carrier content, and in years for backups and devices.
What Carriers Keep, and For How Long
The common assumption that a carrier can pull up a year of someone’s texts is wrong. Most major carriers either never store text message content or delete it within days.
Verizon retains the actual text of messages for roughly three to five days. AT&T says it does not store text content at all. T-Mobile’s retention of content has historically been limited, and policies shift over time. No federal law requires carriers to store text message content for any minimum period, so the window for pulling content from a carrier closes almost immediately. If the messages were sent more than a week ago, the carrier almost certainly cannot help with content.
Metadata is a different story. Call detail records and text message logs showing who texted whom, when, and from what number are retained far longer, ranging from about one year to seven years depending on the carrier and the record type. Federal Communications Commission rules require telephone companies to retain call records for at least 180 days, and most carriers go well beyond that for business reasons. Metadata alone can establish timelines, contact patterns, and relationships between parties even when the content itself is gone.
So a subpoena to a carrier reaches back days for content and years for metadata. Anyone who realizes texts matter to a case needs to act within days on the content side, or shift focus to another source.
Cloud Backups: Where Old Messages Actually Live
Cloud backups are usually the most productive source for older text messages. iPhones configured to back up to iCloud can preserve iMessage, SMS, and MMS messages as part of the device backup, potentially going back years as long as the account remains active and the user has not deleted the backup. Apple will provide iCloud content only in response to a search warrant supported by probable cause, or with the customer’s consent.1Apple. Legal Process Guidelines – Apple
Android users who back up to Google may similarly have message history preserved in their Google account. The framework is the same: a subpoena can produce basic subscriber information, but content typically requires a warrant.
An important distinction: iMessage conversations are end-to-end encrypted between devices, and Apple cannot intercept or produce them while they travel. But once those same messages land in an iCloud backup that is not protected by Apple’s Advanced Data Protection, they become accessible to Apple and, with proper legal process, to the requesting party.1Apple. Legal Process Guidelines – Apple
Encrypted Apps Create a Hard Ceiling
Some platforms have almost nothing to hand over no matter how far back you go.
Signal, in response to a federal subpoena, could produce only the date and time a user registered and the date of the user’s last connection. No message content, no contact lists, no call logs.2Signal. Government Requests
WhatsApp does not store messages once delivered. Undelivered messages stay on WhatsApp’s servers for 30 days before deletion. A valid subpoena can produce basic subscriber records like name, service start date, last-seen date, and IP address. Blocking information requires a court order, and any stored content such as profile photos and group information requires a search warrant.3WhatsApp Help Center. Information for Law Enforcement Authorities
Apple does not retain iMessage communication logs and cannot decrypt iMessage data in transit. The only iMessage-related metadata Apple possesses is capability query logs, which show whether a phone number or email address can receive iMessages. Those logs are kept for up to 25 days and require at least a court order to obtain.1Apple. Legal Process Guidelines – Apple
If a conversation happened on Signal or WhatsApp and the messages were delivered, no amount of legal process will recover the content from the platform. The only remaining options are the sender’s or recipient’s device, a cloud backup, or a forensic extraction.
The 180-Day Rule for Government Requests
Federal law draws a line at 180 days when it comes to government access to stored electronic communications. Under 18 U.S.C. § 2703, content stored by an electronic communications service for 180 days or less can only be obtained with a search warrant based on probable cause.4Office of the Law Revision Counsel. 18 USC 2703 – Required Disclosure of Customer Communications or Records
Content stored for more than 180 days can be obtained through a warrant, or alternatively through a subpoena or court order if the government provides prior notice to the account holder. The subscriber can then move to quash the subpoena before the data is disclosed. Delayed notice is permitted in some circumstances, and many prosecutors simply obtain a warrant for all content regardless of age to avoid Fourth Amendment challenges.4Office of the Law Revision Counsel. 18 USC 2703 – Required Disclosure of Customer Communications or Records
One important boundary: the Stored Communications Act governs government access to communications held by service providers. It does not directly control civil discovery between private parties. Civil litigants use the Federal Rules of Civil Procedure, which have their own framework. The SCA can still limit what a carrier hands over in response to a civil subpoena, because the provider may refuse to disclose content absent a qualifying legal process.
Several states have enacted electronic privacy laws more protective than the SCA, requiring warrants for all stored content regardless of age. In those states the 180-day distinction does not apply, and a warrant is needed for any message content from a provider.
Which Legal Tool Reaches Which Data
The process for getting text messages differs by case type and target.
Civil Cases
Messages from the opposing party come through a Rule 34 request for production, which covers electronically stored information in any medium. The responding party has 30 days to respond and must produce the information in the form it is ordinarily maintained or in a reasonably usable format.5Legal Information Institute. Federal Rules of Civil Procedure Rule 34 – Producing Documents, Electronically Stored Information, and Tangible Things
Records from a non-party like a carrier require a subpoena under Rule 45. The subpoena must identify the specific records sought, be served with advance notice to all parties, and direct compliance at a location within 100 miles of where the recipient resides or does business. The recipient can object within 14 days, and the issuing party must take reasonable steps to avoid imposing undue burden.6Legal Information Institute. Federal Rules of Civil Procedure Rule 45 – Subpoena
Criminal Cases
Government access to text message content from providers almost always requires a warrant under the SCA. Prosecutors seeking metadata or non-content records may use a court order under § 2703(d), which requires specific and articulable facts showing the records are relevant to an ongoing investigation. Defendants can subpoena text messages that are material to their defense, and prosecutors have a constitutional duty to disclose any text messages favorable to the accused, regardless of whether the defense requests them.4Office of the Law Revision Counsel. 18 USC 2703 – Required Disclosure of Customer Communications or Records
Preservation Cannot Wait
Because carrier-stored content vanishes within days, preservation on the parties’ own devices is where most cases are won or lost. The duty to preserve evidence arises as soon as litigation is reasonably anticipated, not when a lawsuit is actually filed. The moment a dispute looks like it could end up in court, both sides need to stop deleting messages.
A proper litigation hold notice must be in writing, identify the reason for the hold, describe what kinds of information are relevant, and include clear instructions to suspend automatic deletion on phones and messaging apps. Simply telling employees to preserve “relevant documents” without practical guidance has been found insufficient by multiple courts. The notice must specifically call out text messages as a category of data to preserve.7U.S. District Court District of Nebraska. Litigation Holds – Ten Tips in Ten Minutes
Courts take text message spoliation seriously. Federal courts have imposed sanctions ranging from $10,000 for deleting 91 text messages to $931,500 in a products liability case where a company failed to stop automatic deletion on company-issued phones. Other courts have issued adverse inference instructions, telling the jury to presume the destroyed messages would have been unfavorable to the party who deleted them. Under Rule 37(e) of the Federal Rules of Civil Procedure, if the court finds information was lost because a party failed to take reasonable preservation steps and the loss cannot be cured, it can impose measures no greater than necessary to address the prejudice. If the loss was intentional, the court can presume the information was unfavorable, instruct the jury accordingly, or dismiss the case entirely.
Providers can also help with short-term preservation. WhatsApp, for example, will preserve account records for 90 days when presented with an official criminal investigation, pending receipt of formal legal process. That kind of provisional hold can buy time while a warrant is prepared.3WhatsApp Help Center. Information for Law Enforcement Authorities
When the Message Is Deleted: Forensic Recovery
Deleted messages are not always gone. When a message is deleted on a phone, the device typically removes it from the visible inbox but does not immediately overwrite the underlying data. That data can persist for weeks or months until the storage space is needed for something else.
Forensic examiners use specialized mobile device forensic tools to extract data from phones, including deleted messages. These tools range from logical acquisitions that copy files visible to the operating system, to physical acquisitions that image the device’s entire memory chip, to chip-off extractions that physically remove the flash memory for analysis. Deeper extraction methods can recover more data, but the risk of altering the device also increases.8National Institute of Standards and Technology. Guidelines on Mobile Device Forensics
How much can be recovered depends on the age of the device, its make and model, the type of encryption used, how much new data has been written since deletion, and whether the user made regular backups. Messages sent through encrypted third-party apps are harder to recover because the data may be stored in an encrypted container on the device. Law enforcement must obtain a court order before using forensic tools to extract data from a phone, consistent with the Supreme Court’s holding in Riley v. California.
The practical reach-back, then, has less to do with subpoena drafting than with source selection. A subpoena to Verizon this week reaches back to Monday. A warrant for an iCloud account may reach back years. A phone in evidence may hold everything. The right question is not how far a subpoena can reach, but which target still has what you need.