Pause the game, then access the cell phone. Select "Dial", then enter one of the following numbers, including the # symbol, and choose "Call". If you entered the code correctly, a message will appear. Then, go to "Cheats", and select the now unlocked option.
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Player Ability

Full Health --> #1

Car Mass (increased mass for harder collisions) --> #2

Milk Bones (increased melee attack damage) --> #3

Add Police Notoriety (+1 star to police wanted meter) --> #4

Player Pratfalls --> #5

Infinite Sprint --> #6

Unlimited Clip (never reload, except for RPGs) --> #9

Infinite Ammo --> #11

Heaven Bound (killed bodies float upward) --> #12

Add Gang Notoriety (+1 gang attack level) --> #35

Never Die --> #36

No Cop Notoriety --> #50

No Gang Notoriety --> #51

I Am Giant (become very tall) --> #200

Itty Bitty (become very short) --> #201

Give Cash (gain $1,000) --> #2274666399

 

Vehicles

Repair Car (fixes car, boat, and helicopter damage) --> #1056

Ambulance --> #1040

Anchor --> #1041

Atlasbreaker --> #1042

Attrazione --> #1043

Backdraft --> #1044

Backhoe --> #1045

Bag Boy --> #1046

Baron --> #1047

Bear --> #1048

Bootlegger --> #1049

Bulldog --> #1050

Bulldozer --> #1051

Compton --> #1052

Eiswolf --> #1053

FBI --> #1054

Five0 --> #1055

Hollywood --> #1057

Justice --> #1058

Kent --> #1059

Mag --> #1060

Mixmaster --> #1061

Mongoose --> #1062

Oring --> #1063

Phoenix --> #1064

Quasar --> #1065

Quota --> #1066

Rampage --> #1067

Raycaster --> #1068

Reaper --> #1069

Septic Avenger --> #1070

Shaft --> #1071

Stilwater Municipal --> #1072

Superiore --> #1073

Taxi --> #1074

The Job --> #1075

Titan --> #1076

Toad --> #1077

Varsity --> #1078

Venom Classic --> #1079

Vortex --> #1080

Zenith --> #1081

Horizon (commerical helicopter) --> #711

Snipes57 (executive private jet) --> #712

Tornado (police helicopter with minigun and anti-tank missiles; can lock onto other vehicles or be manually aimed) --> #713

Wolverine (P-51 Mustang-style airplane with machine gun) --> #714

Kaneda (custom street racing motorcycle) --> #801

Kenshin (street racing motorcycle) --> #802

Melbourne (Harley-style motorcycle) --> #803

Sabretooth (custom Harley-style motorcycle) --> #804

Sandstorm (dirtbike) --> #805

Widowmaker (moped) --> #806

Hurricane (speedboat) --> #825

Miami --> #826

Python --> #827

Shark (personal watercraft) --> #828

Skipper (yacht) --> #829

 

Retailer Promotion Vehicles

Gyro Daddy helicopter (two person mini-helicopter) --> #4976

Destroy UFO (two person flying saucer) --> #728237

Peewee mini-bike (very small mini-bike) --> #7266837

 

Weapons

12 Gauge --> #920

44 Shepherd --> #921

AR200 (SAW-type machine gun) --> #922

AR50 (X8-type assault rifle) --> #923

AR50 Launcher (X8-type assualt rifle with grenade launcher) --> #924

AS14 (fully automatic shotgun) --> #925

Baseball Bat --> #926

Chainsaw --> #927

Fire Extinguisher --> #928

Flamethrower --> #929

Flashbang --> #930

GAL43 (Uzi-like sub-machine gun) --> #931

GDHC --> #932

Grenade --> #933

Holt 55 (fully automatic pistol) --> #934

K6 Krukov --> #935

Knife --> #936

Machete --> #937

McManus2010 --> #938

Minigun --> #939

Molotov --> #940

Nightstick --> #941

NR4 --> #942

Pepper Spray --> #943

Pimp Cane (shotgun) --> #944

Pipe Bomb --> #945

RPG --> #946

RPG Annihilator (manual or lock-on guided RPG) --> #947

Samurai Sword --> #948

Satchel --> #949

Shock Paddles (bring dead people back to life) --> #950

SKR-9 --> #951

Sledgehammer --> #952

Stungun (semi-automatic Taser-style weapon; can kill if used repeatedly) --> #953

T3K Urban --> #954

Tire Iron --> #955

Tombstone --> #956

Vice 9 --> #957

XS-2 (fully automatic shotgun) --> #958

Pimp Slap (big foam middle finger) --> #969

 

Weather

Wrath of God (thunderstorm with random lightning strikes) --> #666

Overcast --> #78665

Heavy Rain --> #78666

Light Rain --> #78668

Clear Skies --> #78669

Normal Weather --> #78670

  -->

World -->

Super Explosions --> #7

Super Saints (almost invincibile Homies and Saints with better weapons) --> #8

Drunk Pedestrians --> #15

Evil Cars (drivers try to run you down) --> #16

Low Gravity (cannot be used with helicopters; use in Insurance Fraud mode to glide) --> #18

Pedestrian War (pedestrians and drivers fight each other) --> #19

Raining Pedestrians (people spawn and fall from sky but die on the ground) --> #20

Everybody Must Get Shrunk (everyone is very short) --> #202

Time Set Noon (hour set to 12 p.m. with minutes unchanged) --> #1200

Time Set Midnight (hour set to 12 a.m. with minutes unchanged) --> #2400