There is no cheat console, testingcheats, or code entry in The Sims 3 Mobile (iOS/Android/Java ME). It's a stripped-down, microtransaction-driven version distinct from PC/Console.
Third-party "mod APKs", "LP generators", or "save editors" are scams/malware. They steal Apple/Google credentials, install adware, or brick your account. EA bans devices/accounts using modified clients.
Want Real Cheats? Play The Sims 3 on PC (Steam/EA App) or Console. Press Ctrl+Shift+C → testingcheatsenabled true → shift-click everything.