44-800-064-1087

O2 customer on payg and getting calls is Australia. It also seems to cost me even though I don't answer.
Did anyone contact O2 to find out why they are being charged?

With further research I found that is is the LBM company, on behalf of O2. The reason we are being charged even is the call is not answered is... Voicemail.
From the O2 site:
"Will I be charged for someone leaving me a voicemail message when I am abroad?

If you are abroad when the call is diverted to Voicemail on no answer or busy, the caller is charged for a UK deposit call and you will be charged for a UK to roaming call and a roaming call to voicemail (this is as per 901). If the call is diverted to voicemail on unreachable, the caller is charged for a UK deposit call and you are not charged.

Note: If you do not wish to receive these charges we recommend that the Voicemail divert is disabled before leaving the UK.
To switch Voicemail divert off dial 1760. To then switch it back on when you are back in the UK dial 1750."

http://service.o2.co.uk/IQ/SRVS/CGI-BIN/WEBCG ... ile),CASE=18471

Crazy behaviour O2!
Of course we don't wish to pay a ridiculous roaming charge, but voicemail would be really handy when abroad. But I think they already know that.

This number called me 2014 Oct 15.
I did not pick up since I no longer answer calls from numbers I don't know.

yeah I'm getting an increasing number of calls from this number, i think it could be a scam someone pretending to be O2 as only O2 customers are effected (that i know of). in the end i just blocked the number.

I've got the exact same number calling me like 2 times a day

I got a missed call I'm on. Vodafone

Three calls in less than 24hours, truecaller app stated "identified as spam".

448000641087 keeps calling my mobile its really annoying have installed true caller to block them

i couldnt talk

I'm ee and getting this number too

Vodafone cust and just got a missed call from this number