This telephone number is from Tonga and is being used as part of a premium-rate phone scam targeting victims around the world. The scammers target your mobile phone by making a one-ring call to your number. This is in the hope that you will phone them back. Victims who do phone will be connected to an extremely expensive premium-rate number.
If you receive a phone call from the number +676 8500144 then you should not answer the phone. Also don’t text the number or phone back.