Warning: Getting Calls From a +224 Number? Do Not Answer

There seems to some kind of ‘scam’ going on with a certain call on your mobile, which when answered deducts Rs.45/minute(~$1) from your talktime balance. The said calls are reported from the following numbers +22455104323 and +22455104324. There have been total 3 reported cases so far of the call, 2 of which resulted in talktime deduction and the third was not answered. Though #missedcallscam was trending in Twitter Mumbai today but it was the same tweet getting RTed, so not much of a chaos.
The number which might look like a Mumbai number on the first look, given the 022 STD code, actually is an 11 digit international number and resonates with the African country Guinea that has calling code of +224 and the country follows a 8 digit standard phone number.

At this moment there is no certainty as to what this number is and if this is true or rumor. In case you get a call and you have no relatives in that little African country, avoid answering it.
A random search revealed some forum discussing this number for past couple of months but no case of balance deduction was reported.