The telephone number +6785098203 is being used as part of a Wangiri scam originating in Vanautu. Wangiri is a Japanese term meaning One-cut. This refers to the fact that the scammers make a one-ring call to target mobile numbers and then cut the call immediately. This is in the hope that the person who received the call will pay a courtesy call back.
However, there is nothing courteous about the tactic. Anyone who phones the number +6785098203 will be connected to a premium-rate phone line. If you receive a call from this number then do not answer it or phone back.