Mysterious phone number

Do you ever received warning sms from anonymous or your friend or your own relative about no to pick up this red coloured phone number, +62852731520946? There was a rumor in Indonesia that they was a group of black spirit tried out their newest black spirit spell. Whoever pick that strange number will die straight away

I have done some researched about it and the mystery already solved

The authority have investigated that it was just a hoax. The police have detained the a group of teenage who send fake rumor messages to their friends. Then after that the rumor had spread to our country