TRAI 2026: Telcos Must Use AI to Block Spam, No Complaint

You registered on DND, yet your phone still buzzes with loan, insurance and “congratulations you won” calls every single day. From late March 2026 you no longer have to do anything to fight back. By a TRAI Direction dated 27 February 2026, every telecom operator must now run AI/ML systems that detect spam callers on their own and act against them even if no customer ever complained, and must warn other operators about a suspect number within two hours of flagging it.

Until now, action against a spam caller usually started only after a consumer complained on 1909 or the DND app. TRAI found that this complaint-driven model was a weak deterrent, and that roughly 85 percent of spam complaints were against unregistered telemarketers. The new Direction shifts the burden to the operators: their machines must spot the spammer first, and a single flagged number can trigger network-wide action across all telcos.

Here is what the 27 February 2026 Direction makes mandatory, in plain terms:

1. Telcos must act without your complaint. Every operator must use its AI/ML “UCC_Detect” system to identify and flag a spam caller's number on its own. You do not have to lodge a complaint first.
2. AI reads calling patterns, not your messages. The system flags a number by analysing behavioural signatures such as call and message volume, velocity, diversity, duration and temporal patterns. A number behaving like a bulk spammer gets flagged in near real-time.
3. A flagged number is shared with other telcos within two hours. When the operator that receives the spam call (the Terminating Access Provider) flags a number as a “Suspected UCC CLI”, it must share that number with the spammer's own operator (the Originating Access Provider) over the common DLT blockchain platform immediately, and in any case within two hours.
4. The spammer is warned and tracked across all networks. The originating operator must immediately notify the sender that the number is flagged, and within one business day trace the sender's KYC identity and all telecom numbers held by that person, then share this on the DLT platform so every operator can map the same spammer.
5. Five strikes in ten days triggers real action. If five or more numbers of the same sender are flagged as suspected spam within ten days, the operators must act against the sender. The first instance triggers KYC re-verification within three business days; repeat instances trigger physical KYC verification.
6. Persistent spammers face disconnection. A sender found sending unsolicited commercial communication is liable to have outgoing calls barred, or to face disconnection and blacklisting across all operators for one year.

The Direction was issued under section 13, read with sub-clauses (i) and (v) of clause (b) of sub-section (1) of section 11, of the TRAI Act, 1997. All operators were directed to comply within thirty days from the date of issue, that is by late March 2026.

The new AI system works in the background, but your existing rights to complain are untouched. If a spam call or SMS slips through, you should still report it so the system gets more signals:

1. Call or SMS 1909. This is the national number for reporting unsolicited commercial communication. Forward the spam SMS or report the spam call here.
2. Use the DND app or your operator's app. Register or update your Do Not Disturb preferences and lodge complaints with the number, date and time of the spam call.
3. File a complaint with TRAI / your operator. If spam continues despite DND, raise it with your operator first and escalate to TRAI. See our guides on how to stop spam calls and SMS using DND and what to do when spam calls continue despite DND registration.
4. Use an RTI to push a stalled complaint. If your complaint is ignored, an RTI to the right public authority can force a written answer. Draft one in minutes with our AI RTI Drafter, or follow how to file a TRAI telecom complaint in 2026.

Because the system now acts on calling patterns rather than complaints, an ordinary heavy caller, a small business owner, or someone running an OTP-style alert service could in theory be flagged. The Direction builds in a warning step before any harsh action, so do not panic:

1. You get a notification first. The originating operator must send you an SMS or email telling you your number has been flagged as a “Suspected UCC CLI” on the basis of pattern analysis. This is a warning, not an instant disconnection.
2. Action is graded, not immediate. A first flag leads to KYC re-verification, not a cut connection. Disconnection and one-year blacklisting are reserved for senders actually found to be sending unsolicited commercial communication.
3. Respond using the contact in the notice. The flagging notification carries a phone number and email for clarification. Contact them, confirm your identity, and explain the genuine reason for your call volume.
4. Complete KYC re-verification quickly. If asked to re-verify your KYC, do it within the stated window so your service is not interrupted.
5. Keep written proof. Save the flagging SMS or email and your reply. If your number is wrongly disconnected, an RTI or a written complaint backed by this record is your strongest tool. For the full RTI route, see The RTI Playbook.

As Kashvi Pathak notes, the safeguard for honest users is the mandatory warning notice and the graded KYC ladder, so anyone wrongly flagged should engage with the notice immediately rather than ignore it.

No. From late March 2026 your telecom operator must use its AI/ML system to detect and act against spam callers on its own, even if no customer complained. Your complaints on 1909 and the DND app still help, but they are no longer the only trigger.

The Direction is dated 27 February 2026 and gave all access providers thirty days from the date of issue to comply. That means the system was due to be operational by around late March 2026.

The Direction lists behavioural signatures, not message content, as the basis for flagging. The system analyses patterns such as call and message volume, velocity, diversity, duration and temporal patterns to spot bulk spam behaviour.

Very fast. When a number is flagged as a “Suspected UCC CLI”, the terminating operator must share it with the spammer's own operator over the common DLT platform immediately, and in any case within two hours of flagging.

No instant block. You first get a notification that your number has been flagged. A first flag triggers KYC re-verification, not disconnection. Disconnection and one-year blacklisting apply only to senders found actually sending unsolicited commercial communication.

Use the phone number and email given in the flagging notice to seek clarification and confirm your identity, complete any KYC re-verification within the stated window, and keep the notice and your reply as proof. If service is wrongly cut, escalate with a written complaint or an RTI.

It was issued under section 13, read with sub-clauses (i) and (v) of clause (b) of sub-section (1) of section 11, of the TRAI Act, 1997, and builds on the Telecom Commercial Communications Customer Preference Regulations, 2018.

No. The existing DND framework, the 1909 reporting channel and DLT registration of senders continue. The new Direction adds proactive, AI-driven detection on top of them so action does not depend on your complaint alone.

1. TRAI Direction dated 27 February 2026, “institutionalization of AI/ML-based UCC_Detect intelligence for inter-operator sharing and regulatory action against UCC senders”, File No. RG-25/(17)/2022-QoS, http://www.trai.gov.in/sites/default/files/2026-02/Direction_27022026.pdf
2. Telecom Regulatory Authority of India, www.trai.gov.in
3. Mondaq, “Another Push To Curb UCC: TRAI Mandates AI/ML-Based Detection Of UCC And Inter-Operator Intelligence Sharing”, https://www.mondaq.com/india/new-technology/1760412/another-push-to-curb-ucc-trai-mandates-aiml-based-detection-of-ucc-and-inter-operator-intelligence-sharing
4. MediaNama, “TRAI directs telecom operators to share spam data using AI”, https://www.medianama.com/2026/03/223-trai-telecom-operators-share-spam-data-ai/