Number overview
0120-924-580 is a number with many complaints about nuisance calls posing as a "Fiber-Line Support Center" pushing internet-line switches.
Reported tactics
- The caller claims, "This is the Fiber-Line Support Center," hinting at a connection to NTT or a major ISP
- The caller pitches a switch with claims like "your current line is outdated" or "your bill will drop"
- Without consent, the caller proceeds unilaterally with "We'll start the procedure"
- Cancellation fees and installation costs are not adequately explained
No legitimate organization named "Fiber-Line Support Center" exists. It is unrelated to NTT or any ISP's official support desk.
How to handle this call
Don't pick up
Be cautious even with 0120 numbers when the number is unknown. Free Dial doesn't automatically mean safe.
If you do answer
Don't share details of your current contract (ISP name, line type, etc.). Say "I don't need it" and hang up.
Where to report or get help
- Ministry of Internal Affairs and Communications - Telecommunications Consumer Consultation Center: 03-5253-5900
- Consumer Hotline: 188