How to Check Your Phone’s IMEI Before Selling: A Comprehensive Guide for a Safe Transaction
When planning to sell a used smartphone, one of the most important steps is to verify the IMEI (International Mobile Equipment Identity) code. This is a unique 15-digit identifier that acts as the device’s “personal code.” Providing the correct code to the buyer not only enhances trust but also helps the seller avoid potential legal disputes after the transaction.
In this article, we will discuss how to find this code, how to check its status in international databases, and why it is an essential part of Due Diligence.
1. What is IMEI and Why is it Important When Selling?
IMEI is an international standard used to identify devices operating on GSM, WCDMA, and IDEN networks. Unlike software, this code is hard-coded into the device’s hardware.
During the sales process, IMEI serves several functions:
- Authenticity Verification: Proves that the device is not counterfeit (cloned or fake).
- Legitimacy Assurance: Confirms that the phone is not listed on a blacklist (stolen or lost items list).
- Financial Cleanliness Proof: Shows whether the device is not blocked due to unpaid leasing obligations to the operator.
2. How to Find Your Phone’s IMEI Code?
There are several universal methods suitable for both iOS and Android devices:
| Method | Actions | Notes |
|---|---|---|
| USSD Code | Dial *#06# | Works on all phones without internet. |
| Settings (iOS) | Settings > General > About | Scroll down to the IMEI section. |
| Settings (Android) | Settings > About Phone | May be under the “Status” section. |
| Physical Check | SIM tray / Packaging | Useful if the phone won’t turn on. |
3. Critical Verification Steps Before Selling
Once you find the code, you need to do your homework to ensure a transparent transaction.
3.1. Blacklist Check
The global association GSMA manages a central database where stolen devices are registered. The buyer will check this, so it is worth doing it first as a seller. Use tools like IMEI.info or IMEIPro.info. If the status is Clean, the device is ready for sale.
3.2. Operator Blocking Check (Lithuanian Context)
Operators in Lithuania (“Telia”, “Tele2”, “Bitė”) share information about devices for which payments have not been made when purchased on credit. If you sell a phone that still officially belongs to the operator, the buyer risks having the device blocked throughout Lithuania. Before selling, ensure that all bills are paid.
3.3. iCloud / Google Lock Status
IMEI verification can also show whether Find My iPhone (Activation Lock) or FRP (Factory Reset Protection) is activated on the device. When selling the phone, these features MUST be turned off; otherwise, the buyer will not be able to use the device.
4. Why Should You Not Publicly Post the Full IMEI Code in the Listing?
While transparency is important, security experts recommend covering the last 4-5 digits of the IMEI in listing photos.
- IMEI Cloning: Criminals can copy your “clean” IMEI and record it on a stolen device.
- Fraudulent Reports: With the full code, malicious actors can falsely report the device as stolen to the operator, thus blocking your phone even before the sale.
Best practice: Indicate in the listing that you will provide the IMEI code in person to potential buyers during a meeting or direct conversation.
5. Legal and Ethical Aspects
According to the civil code, the seller must provide information about the item’s defects. If you sell a phone with a blocked IMEI without knowing it, the buyer has the right to demand a refund, and in extreme cases, this may be considered fraud.
Transparency
By providing the IMEI code to the buyer, you show that you have nothing to hide and that the device is legitimate.
Security
Always disable all accounts (iCloud/Google) before handing over the phone so that the IMEI is not linked to your personal data.
“Providing this code correctly to the buyer not only increases trust but also protects the seller from potential legal disputes after the transaction.”
Conclusions
Checking the IMEI code is a crucial step for a safe transaction. It protects both parties: the buyer receives a functioning device, and the seller avoids claims regarding the device’s origin or financial obligations. Spend 5 minutes on this – it’s the best investment for a smooth selling process.
Sources and Recommended Literature:
- GSMA (2024). IMEI Database and Blacklisting Standards. Accessed via the official GSMA website. (International standard for device identification).
- Communications Regulatory Authority of the Republic of Lithuania (RRT). Guidelines on Mobile Device Blocking and Consumer Rights Protection.
- Zhu, J., et al. (2021). Smart Device Identity and Authentication: A Study on IMEI Security Vulnerabilities. “Journal of Cyber Security and Mobility”. (Research on IMEI vulnerabilities and cloning prevention – Google Scholar).
- Apple Inc. (2026). About Activation Lock on iPhone and iPad. (Technical documentation on IMEI linking to user accounts).
- Benson, K. (2023). Mobile Device Forensics: Identity and Persistence. “Digital Investigation Journal”. (Analysis of IMEI data persistence and its significance in forensic investigations – Google Scholar).
Read also: What to do if I forgot my phone password before selling it?