112 is the national emergency number for police, and it works. If you are in Lagos and you need and emergency number that works and is prompt, you can dial 767 or 122 for any emergency situation including to report crime. You will not be charged , the Nigerian emergency numbers are toll-free.

Emergency Management (LASEMA) 08060907333, 08023127654, 08022234870, 016574706, 016574714
Nigeria Police 08033011052, 08056250710, 08033183477
NDLEA 0803347868
NAFDAC 014528031, 014731018
Fake Drugs/ Narcotics (Task Force) 08033213799, 08034975296
Distress Call 767, 112
Environmental & Special Offences Task Force 07055028673
Refuse Issues (LAWMA) 5577 (Toll Free) 07080601020, 08023128099
Land Issues 08034030263
Vehicle Registration/Drivers License (MVAA) 08029293099
Tax Issues (LIRS) 08033033121, 08033047270, 014979030-4
Fire/Safety Services 08033234943, 08023321770
Security Trust Fund 08028328204
Signage/Outdoor Advertising(LASAA) 767, 112
Environmental/Noise Pollution (LASEPA) 08033060452
Cutting of Roads (LASMIRA) 08033060452
Broken Pipe/Water Leakage 08034068265
Pothole/Collapsed Road 090 6704 4444(Text & WhatsApp only). 070 8888 1841(Calls)
Lagbus 08033036816
BRT 08023146096