Two-Step verification links phone number to Samsung account. Users must enter unique code via SMS for account access. Codes are valid for one minute and expire after one use. Users can save up to five backup codes
Only call back if you have good reason to believe the number belongs to you. Single-ring missed calls may be from crammers trying to charge. Telemarketers must ring at least four times before hanging up
Search engines can reveal large companies and businesses. Facebook search may show profiles linked to the number. Reverse phone lookup sites like White Pages provide caller information. Facebook app scans contacts for unknown callers
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
SIM swapping is a fraudulent technique to control phone numbers. Hackers use phone numbers to access accounts through two-factor authentication. SIM cards are tiny chips with unique numbers identifying users and carriers
No caller ID means caller deliberately hides their phone number. Calls can be legitimate or malicious, like tech support scams