I keep receiving calls from this number on my mobile phone,and they either hang up before it goes to message bank, or they hang up as soon as I answer the phone.

I am the same as all the above

I get the same, they just call, I hear background voices talking and then just hang up...

Called, hung up when I answered, disconnected signal when I called back.

Same as above

I get the same as the previous comment and when i try to return i get an exgaged signal

They have called me too and just hang up

these people have called several times and when I answer they just hang up in my ear.