The Department of Telecom (DoT) has issued a stern advisory, declaring tampering with mobile phone identifiers like the 15-digit IMEI number a non-bailable offense. Under the Telecommunications Act, 2023, violations can result in up to three years of imprisonment, fines up to Rs 50 lakh, or both. Manufacturers, importers, and sellers must comply with regulations, including registering IMEI numbers on the Device Setu portal, to prevent counterfeit devices and secure telecom networks.