Who called from 9497789900

Called at 2:13 PM, CID showed Name Unavailable.  Usual three rings and then hung up, np message.  Now blocked.

Answered phone, female greeted me by my first name. I asked who was calling and she said it was Karen calling again with R&T builders (not sure about the R&T part). Never talked to her before so how could she be calling again. Hung up. Blocked the number.