Từ khóa: #fake troubleshooting calls

Users should beware of calls or SMS from strange numbers about SIM upgrades or replacement. (Photo: SGGP)

Smartphone users warned of fake troubleshooting calls

Functional agencies lately have warned citizens of criminals impersonating operators of major network carriers to take control of subscribers’ SIM via fake troubleshooting calls, and then illegally sign in bank accounts to steal money.