NB: The phones are numbered from top to bottom (or left to right).
NB: Each phone gives you two missions; when you finish the first one, another mission is given to you without you having to answer another phone.

Phone	Description	Stuff you might need	Difficulty
1a	Pick up a Rocket Launcher, blow up some buses.	Nothing.
1b	Pick up briefcase, deliver payments to contacts, kill a policeman.	Any weapon except a pistol (and your fists!)
2a	Meet Paco 'n the boys, get some guys to follow you, kill Paco.	A car or Machine Gun to kill Paco!
2b	Blow up TV Vans (time limit).	Any weapon bar the Pistol.
3a	Kill 8 federales in 8 minute time limit.	A car, Machine Gun and Armour are optional.
3b	'Disappear' three cars by dumping them in the water.	Nothing.
4a	Steal a Tanker, change its plates and drop it off.	Nothing.
4b	Kill all the guys that handled the chemicals.	Can't go wrong with a Machine Gun.

Phone	Description	Stuff you might need	Difficulty
1a	Get car, kill guys.	Machine Gun and Armour.
1b	Go to station, follow guy, kill him.	Machine Gun
2a	Go to pick up guy, interrogate the driver of a car (kill him afterwards for a Gratitious Violence Bonus!), rig a car and blow up hideout.	A gun (preferably a Machine Gun) to cream the guy you interrogated.
2b	Blow up Limos, then steal one.	Machine Gun and Armour, awesome driving skills.
3a	Kill guys, retreive briefcase.	Machine Gun.
3b	Blow up an underground wharehouse with RC Cars.	Keen sense of direction.
4a	Steal and drop off an Ambulance, Fire Truck, Juggernaut and Squad Car.	Nothing.
4b	Get car (time bomb), go from car to car... then kill the guy who set you up.	Machine Gun.

Locations of Special Items

Extra Lives:
NW Little Bogota

Multipliers:
S Sunrise
NW Sailor's Wharf
NE Sunview
SW Atlantic Heights