- 07-Jun-2025
- Cyber and Technology Law
Your mobile number is a crucial piece of personal information that can be used for communication, identification, and sometimes even financial verification. Given its sensitive nature, unauthorized selling or sharing of your mobile number by websites can lead to privacy breaches, spam calls, fraud, and identity theft. Hence, data protection laws strictly regulate how websites collect, store, and share such personal data.
Websites and apps must obtain explicit, informed, and voluntary consent from you before collecting, processing, or sharing your mobile number with third parties.
Consent requests should clearly explain why the data is needed, who will receive it, and for what purposes it will be used.
Blanket or hidden consent buried in terms and conditions is not considered valid.
In India, the Digital Personal Data Protection Act, 2023 mandates strict conditions for processing personal data including mobile numbers. Selling or sharing data without consent is prohibited.
Globally, laws like GDPR (Europe) and CCPA (California) have stringent rules against unauthorized data selling and impose heavy fines for violations.
These laws grant users rights such as data access, correction, deletion, and the ability to object to data processing.
Reputable websites publish detailed privacy policies that disclose their data handling practices, including if and how mobile numbers are shared or sold.
You should always read privacy policies before submitting your mobile number, and look for clear opt-in or opt-out options regarding marketing communications.
Selling personal data, especially sensitive identifiers like mobile numbers, without user permission is illegal under most data protection regimes.
Data brokers and unscrupulous websites that engage in selling mobile numbers risk legal penalties, damage to reputation, and loss of user trust.
If your mobile number is sold without your consent, you may receive unsolicited marketing calls, phishing attempts, spam messages, or even fraudulent schemes.
This unauthorized use can compromise your privacy and security, leading to financial and emotional distress.
You have the right to request information on whether your mobile number has been shared or sold, and to whom.
Data protection authorities allow you to file complaints and seek remediation if your rights are violated.
Some jurisdictions also provide compensation for damages caused by data breaches or misuse.
Websites may share your mobile number with trusted service providers (e.g., payment processors, delivery services) for legitimate purposes with your consent.
Legal requirements, such as court orders or law enforcement requests, may also mandate sharing.
Be cautious while submitting your mobile number online.
Prefer websites with transparent data policies and strong privacy protections.
Use secondary phone numbers or virtual numbers for less trusted sites to minimize risk.
Regularly review privacy settings and opt out of unnecessary marketing communications.
A user registers on a travel booking website and provides a mobile number for ticket confirmation. The website’s privacy policy explicitly states that the number will only be used for booking-related communications and will not be sold or shared for marketing purposes without consent. Later, the user notices marketing calls from third parties and investigates. If these calls stem from the travel website sharing data without consent, the user can file a complaint with the data protection authority to investigate and penalize the website.
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