The telephone number +23675890468 is being used as part of a Wangiri scam originating in the Central African Republic. If you receive a call from this number do not answer and do not phone back.
Wangiri is a Japanese term meaning one-cut. It translates to this tactic because the scammers modus operandi is to make a one ring call and then cut off. Their aim is to make the person who receives the call phone them back. This way they can redirect the call to an international premium rate number. Therefore if you receive a phone call from +23675890468 you should not phone back.