Calls and hangs up when you answer

How can they be so fu...stupid, I will get this guys....
It just a matter of time.

Should I answer app on google play store is free and lets you know negative rated calls before you answer and you can block

This number rings me every day - for past few weeks - If i answer there is no one there - except for today. Lovely speaking lady talking about some charity i have never heard of. When I told her that I was annoyed by weeks of constant calls from this number she just said her data showed my number ( mobile number) goes to answering machine. I told her I do not do any phone donations anymore and I think her company is wasting too much money on nuisance calls. Hopefully I wont hear from them again.

Keep phoning but no answer. Annoying as I'm trying to work

This number keeps calling but never leaves a message. I rang back twice and it 'hangs up' so I have blocked it. Very annoying though, I have heaps of blocked numbers just like this. Please do something Telstra to stop this SPAM!

this number has been repeatedly ring my phone for the last 5 days

I received a call from this number, they hang up after I said "Hello"

spam thanks for this app

Called me numerous times today and addressed me by my first name - how do they know my name? can't something be done to stop these annoying, unwanted and unsolicited calls?

They keep calling my mobile almost every day - I just hit reject button and have them in as "annoy" in my list of phone numbers.

This junk call me 3-5 time a day, no talk - just hang up - why no one can stop them where is authority???

this number (02) 8035 4107 calls every day. I do not answer any more as when I do there is nobody there. After I repeat "hello" 4 or 5 times caller hangs up ... very strange.

This number calling every day has been a while.What for?Insurance company?Scam?Whos know.Very disturbing every day even late night call too.

a recorded voice that talks warns you that you have flouted tax and about the consequence and to call a set of number to resolve your wrong.