An IMEI check is an important part of buying a used phone, but it is not a complete ownership certificate. A clean result cannot prove that the seller has permission to sell, that the device will never be reported stolen later, or that its hardware is healthy.
Check the device while the seller is present and before paying. Allow enough time to activate and test it; a “two-minute check” should not replace a proper inspection.
Read the IMEI from the handset
Dial *#06# or open the phone’s About information. Record each IMEI shown; devices supporting more than one cellular connection may have multiple identifiers. Compare them with the invoice and packaging, where available.
A mismatch needs an explanation and supporting repair or replacement records. It is a reason to pause the purchase, not proof by itself that a named seller committed theft or tampering. Do not accept an offer to rewrite an IMEI to make a problem disappear.
Use the official KYM check
On Sanchar Saathi’s CEIR service, find Know Genuineness of Your Mobile Handset. The published SMS alternative is KYM <15-digit IMEI> sent to 14422.
The portal advises avoiding purchase when the result is blacklisted, duplicate or already in use. Check the displayed model information against the handset. If a response is invalid, missing or confusing, seek official clarification rather than inventing a meaning for that status.
Save the result privately with the purchase records. Do not post full IMEIs in a public sale discussion. An old screenshot supplied by the seller is weaker evidence than checking the actual handset yourself.
Verify account locks before payment
For iPhone, do not buy a device displaying iPhone Locked to Owner. The seller should complete Apple’s legitimate account-removal and erase process. Apple’s pre-owned iPhone guide recommends checking activation, battery condition and Parts and Service History where supported.
On Android, ask the owner to remove their accounts through the supported settings flow before resetting. Google’s device-protection guidance explains why a protected device may require prior credentials after an unauthorised reset. Do not buy on a promise that an online bypass service will unlock it later.
A setup screen alone is not enough: connect and proceed far enough to confirm that previous-owner credentials or organisational enrolment do not block activation. Never ask the seller to disclose their password; they can complete their own sign-out.
Test the functions you will rely on
- Calls, mobile data and supported SIM/eSIM operation with your operator.
- Charging, speakers, microphones and each camera.
- Screen touch response, buttons and biometric setup where appropriate.
- Battery condition, unexpected shutdowns and signs of swelling or damage.
- Storage capacity, model information and available security updates.
A battery percentage is one indicator, not a universal replacement deadline. Request a repair estimate if the battery or another part is questionable. Check carrier locks and regional feature compatibility, especially on imported models.
Keep clear purchase terms
Obtain a receipt identifying the seller, device, date, price and any return terms. Preserve the listing and relevant messages. A traceable payment creates evidence but does not guarantee a refund or buyer protection; understand the payment service and seller’s terms before sending money.
Use a safe meeting place. If a seller will not allow reasonable identity, activation or hardware checks, do not let urgency substitute for those checks.
If a device turns out to be blocked
Contact the seller through a written channel and retain the evidence. Use the appropriate marketplace dispute or consumer complaint process, and report suspected crime to police. Do not attempt to change the IMEI or evade a block.
CEIR blocking is intended to stop a lost or stolen handset being used on Indian mobile networks. DoT’s service description explains blocking, tracing and recovery. A legitimate owner must follow the authorised unblocking process; a buyer should not assume they can lift another person’s report.
Reviewed on 27 October 2026. Clarified what an IMEI check proves, moved ownership verification before payment and removed unsupported certainty about theft, batteries and recovery.
Techleez Editorial Team
The Techleez publishes practical digital guides. For our scope, use of AI assistance and corrections process, read our editorial policy.
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