I heard my phone was ringing but went pick up and I was late. It has gone through to voice mail but caller hadn't left a message. I then rang the number and a female person answered. I didn't tell her my name because I had a suspect, this could be a spam call. I told the person that I missed her call. She then said 'no you didn't'. I told her again 'yes, I did; I've missed a call from your mobile number'. She kept saying 'no I didn't call you'. I then hung up. While I was talking to her, I heard some other people talking in the background and I heard this woman was talking to someone (while I was still on the call to her) and asking 'still more to go'. I was very suspicious of this call and could be a scam.