IMEI is a unique identification code for iPhones. Knowing IMEI helps identify stolen or misplaced phones
IMEI is used by GSM carriers like T-Mobile and AT&T. MEID is used by CDMA carriers like Verizon and Sprint. No two devices have the same IMEI/MEID number
USSD stands for Unstructured Supplementary Service Data. USSD codes are unique codes used by GSM operators. Codes are programmed into mobile numbers or SIM cards. USSD codes contain '#' or '*' symbols with numbers
Foreign visitors staying over 4 months must register their phones. Mobile devices can be used for 120 days without registration since 2015. Each person can register only one SIM-enabled device every 2-3 years. Registration fee for 2024 is 31,692 Turkish Lira
IMEI is a unique numeric identifier for 3GPP and iDEN mobile phones. Usually found in battery compartment or displayed via *#06# code. GSM networks use IMEI to identify valid devices and block stolen phones. Devices without SIM or eSIM usually don't have IMEI
Mobile networks use unique codes for accurate subscriber identification. More than 8 billion mobile subscriptions exist worldwide. Device identification becomes increasingly important with 5G networks