<p><img src="https://images.cointelegraph.com/images/840_aHR0cHM6Ly9zMy5jb2ludGVsZWdyYXBoLmNvbS91cGxvYWRzLzIwMjQtMDIvZjVjMDFkODEtZTk2Zi00Njc1LTk3NjItMTFmMWVmZWFiNGY0LmpwZw==.jpg"></p><p>Telefónica said that the integration with Chainlink ensures that devices’ SIM cards will not undergo unauthorized changes.</p>