I couldn’t verify a definitive public credit for “the voice of the Roblox phone menu” from the information available here. The most likely answer is that Roblox uses either an uncredited studio voice actor or a recorded system voice rather than a publicly named spokesperson.

What’s known

  • Roblox’s public help pages focus on voice chat setup and troubleshooting, not on naming a voice actor for a phone menu.
  • Search results available here did not surface an official Roblox credit or reliable interview identifying the voice.

Best current read

  • If you mean the automated phone support or menu prompts, the voice is not commonly credited publicly.
  • If you mean a specific Roblox game’s phone-style menu, the answer would depend on that game, because in-game UI voices are often separate from Roblox corporate support voices.

Most likely explanation

  • Companies often use outsourced IVR recordings or generic voice talent for phone systems, and those credits are not always published.
  • Unless Roblox has officially named the voice talent in a post, interview, or credits page, there usually isn’t a reliable public answer.

TL;DR

No confirmed public name appears to be available for the Roblox phone menu voice in the sources found.