US Customs and Border Protection (CBP) and Immigration and Customs Enforcement (ICE) have broad authority to search electronic devices at ports of entry, but travelers are not without rights. While officials don’t need a warrant to examine phones, a refusal to cooperate could lead to further scrutiny and potential delays. Individuals with visas may face increased risk, potentially impacting their immigration status. Legal experts clarify that a refusal isn’t automatically grounds for denial of entry for US citizens or green card holders, but it may raise suspicion. The guidelines highlight that the legality hinges on reasonable suspicion, meaning officials must have a justified reason to believe a device contains evidence of wrongdoing. Knowing your rights and understanding potential consequences is crucial for travelers entering the United States. It's essential to be aware that any information found on a device could be used in legal proceedings.