Use any phone in the game and dial these numbers to unlock secret achievements.
555-1037
555-1847
555-1206
555-1233
555-2309
555-2349
555-2402
555-3243
555-3285
555-3840
555-3947
555-4372
555-4565
555-4569
555-5289
555-5723
555-6118
555-6205
555-6322
555-6325
555-6557
555-6667
555-6893
555-6969
555-7613
555-7658
555-7892
555-7934
555-8024
555-8930
555-9132
555-9528
555-9562
555-9723
555-9898
555-9985