Definition & Meaning of "new phone, who dis"in English

What does "new phone, who dis" mean in internet slang?

The phrase "new phone, who dis" is used humorously to pretend ignorance or disconnection from someone, usually to avoid an unwanted conversation or to signal detachment. The structure is a deliberately simplified and grammatically incorrect version of a text-message response ("new phone, who is this?"), reflecting casual SMS-style speech. It is informal slang commonly used in memes and texting culture to imply rejection, avoidance, or playful dismissal of prior contact or responsibility.