What is Samsung product life cycle?

I assume you are asking about Samsung Galaxy phones and not about Samsung washers. Samsung is not Apple and it has huge variety of products (TVs, cameras, computers and etc). In opposite to Apple Samsung has big variety of Galaxy phones. See the list of them and when they were introduced to the public :

2016

November

Samsung Galaxy J1 mini Prime

Samsung Galaxy C9 Pro

September

Samsung Galaxy A8 (2016)

Samsung Galaxy On5 (2016)

Samsung Galaxy On7 (2016)

Samsung Galaxy On8 (2016)

Samsung Galaxy J7 Prime

July

Samsung Galaxy J5 Prime

Samsung Galaxy Note 7

June

Samsung Galaxy S7 Active

Samsung Galaxy J3 Pro

May

Samsung Galaxy Tab A 10.1 (2016)

Samsung Galaxy C5

Samsung Galaxy C7

April

Samsung Galaxy J5 (2016)

Samsung Galaxy J7 (2016)

March

Samsung Galaxy J3

Samsung Galaxy Tab A 7.0

Samsung Galaxy A9 Pro (2016)

February

Samsung Galaxy J1 Mini

Samsung Galaxy S7 Edge

Samsung Galaxy S7

January

Samsung Galaxy J1 (2016)

Samsung Galaxy TabPro S

Samsung Galaxy A9 (2016)

2015

December

Samsung Galaxy A7 (2016)

Samsung Galaxy A5 (2016)

Samsung Galaxy A3 (2016)

November

Samsung Galaxy View

Samsung Galaxy On7

October

Samsung Galaxy J1 Ace

Samsung Galaxy Active Neo

Samsung Galaxy On5

Samsung Z3

September

Samsung Galaxy J2

August

Samsung Galaxy S6 Edge+

Samsung Galaxy A8

Samsung Galaxy Note 5

Galaxy S5 Neo

July

Samsung Galaxy Trend 2 Lite

Samsung Galaxy V Plus

June

Samsung Galaxy S6 Active

Samsung Galaxy J5

Samsung Galaxy J7

April

Samsung Galaxy S6 Edge

Samsung Galaxy S6

Samsung Galaxy Xcover 3

February

Samsung Galaxy J1

Samsung Galaxy E5

Samsung Galaxy A7

Samsung Galaxy E7

January

Samsung Z1

2014

December

Samsung Galaxy A5 (2015)

Samsung Galaxy A3 (2015)

November

Samsung Galaxy Core Prime

Samsung Galaxy Note Edge

October

Samsung Galaxy Note 4

Samsung Galaxy Young 2

September

Samsung Galaxy Alpha

Samsung Galaxy Grand Prime

Samsung Galaxy Core Prime

Samsung Galaxy Pocket 2

Samsung Galaxy Mega 2

August

Samsung Galaxy Star 2 Plus

Samsung Galaxy Ace 4

Samsung Galaxy S Duos 3

July

Samsung Galaxy Core 2

Samsung Galaxy S5 Mini

June

Samsung Galaxy Core

May

Samsung Galaxy K Zoom

Samsung Galaxy Ace Style

April

Samsung Galaxy S5

Samsung Galaxy S3 Neo

January

Samsung Galaxy Note 3 Neo

Samsung Galaxy Grand Neo (GT-I9060)

2013

December

Samsung Galaxy Win Pro (SM-G3812)

Samsung Galaxy J (SGH-N075)

Samsung Galaxy S Duos 2 (GT-S7582)

Samsung Galaxy Trend Plus (GT-S7580)

November

Samsung Galaxy Grand 2 (SM-G7100)

October

Samsung Galaxy Star Pro (GT-S7260)

Samsung Galaxy Express 2 (SM-G3815)

Samsung Galaxy Round (SM-G9105)

Samsung Galaxy Trend Lite (GT-S7390)

Samsung Galaxy Fame Lite (GT-S6790)

Samsung Galaxy Light (SGH-T399)

Samsung Galaxy Core Plus (SM-G3500)

September

Samsung Galaxy Note 3

Samsung Galaxy Gear

July

Samsung Galaxy S4 Mini (GT-I9190)

June

Samsung Galaxy S4 Active (GT-I9295)

Samsung Galaxy S4 Zoom (SM-C1010)

Samsung Galaxy Ace 3 (GT-S7270)

Samsung Galaxy Pocket Neo (GT-S5310)

May

Samsung Galaxy Star (GT-S5280)

Samsung Galaxy Core (GT-S8262)

Samsung Galaxy Y Plus (GT-S5303)

Samsung Galaxy Win (GT-I8550)

April

Samsung Galaxy Mega

Samsung Galaxy Fame (GT-S6810)

Samsung Galaxy S4 (GT-I9500)

March

Samsung Galaxy Xcover 2 (GT-S7710)

Samsung Galaxy Young (GT-S6310)

January

Samsung Galaxy Grand (GT-I9080)

Samsung Galaxy S II Plus (GT-I9105)

Samsung Galaxy Pocket Plus (GT-S5301)

2012

November

Samsung Galaxy S III Mini (GT-I8190)

October

Samsung Galaxy Rugby Pro (SGH-I547)

Samsung Galaxy Express

September

Samsung Galaxy Rush

Samsung Galaxy S Relay 4G

Samsung Galaxy Note II

Samsung Galaxy Reverb

Samsung Galaxy Victory 4G LTE (SPH-L300)

Samsung Galaxy Pocket Duos (GT-S5302)

August

Samsung Galaxy S Duos (GT-S7562)

July

Samsung Galaxy Stellar (SCH-I200)

May

Samsung Galaxy Ch@t (GT-B5330)

Samsung Galaxy Appeal (SGH-I827)

Samsung Galaxy S III (GT-I9300)

April

Samsung Galaxy S Advance

Samsung Galaxy Rugby (GT-S5690M)

March

Samsung Galaxy Pocket (GT-S5300)

Samsung Galaxy Rugby Smart (SGH-i847)

February

Samsung Galaxy Beam

[15]

Samsung Galaxy Y DUOS (GT-S6102)

Samsung Galaxy Mini 2 (GT-S6500)

Samsung Galaxy Ace 2 (GT-I8160)

January

Samsung Galaxy Ace Plus (GT-S7500[L/T/W])

Samsung Galaxy Y Pro Duos (GT-B5510)

Source Samsung Galaxy - Wikipedia