Got the call but no message.  According to the feedback from other site, it claimed to be trip adviser but was a recording saying "Do you hear good?"..... Yes, it was a scam.  I just keep blocking # until they have no more # to recycle.   My friend picked one of scam call. She said she could provide him a low interest loan.  It turned out to be that she used a FAKE company to provide  service to negotiate down his current loan interest rate for upfront $4000+ with no guaranty.  Believed her name was fake too. Scam.