A: Call of Duty: Roads to Victory (via PPSSPP) for campaign, or Modern Combat 5 (native Android) for multiplayer FPS. For true BO2 experience, use Xbox Cloud Gaming.

If you want to play Call of Duty on your phone, these are your best legitimate options:

: Includes maps and weapons inspired by the Black Ops series with console-quality graphics. Call of Duty: Black Ops Zombies

His heart did a little sprint.

: An older, official port specifically designed for mobile zombie survival.