A Mathematical Programming Approach to Brand Efficiency of Smartphones in the US Market

Table 2

Smartphone brands and models.

Brand	Year	Model
Apple	2013	iPhone 4S, iPhone 4, and iPhone 3GS
	2014	iPhone 5, iPhone 4S, and iPhone 4
	2015	iPhone 5S, iPhone 5C, and iPhone 4S
BlackBerry	2013	Torch 9810, Torch 9850, Bold 9900 4G, Bold 9780, and Bold 9930
	2014	Z10, Q10, Torch 9810, and Bold
	2015	Z10, Q10, Z30, and Bold 9930
HTC	2013	One X, Vivid, Titan 2, Evo 4G LTE, Arrive, One S, Amaze 4G, My Touch 4G Slide, Radar 4G, and Trophy
	2014	One, One X+, One VX, Windows Phone 8X, Windows First, Evo 4G LTE, 8XT, Driod DNA, and Windows Phone
	2015	One M8, One, One max, 8XT, One Remix, and Windows Phone 8X
LG	2013	Nitro HD, Viper, Optimus Elite, Spectrum, and Lucid
	2014	Optimus G, Optimus G Pro, Optimus G, Optimus F3, Viper, Optimus Elite, Optimus L9, Spectrum 2, Lucid 2, and Intuition
	2015	G3, G2, G Pro, G Flex, Viper, Optimus L90, and Optimus F3Q
Motorola	2013	Atrix 2, XPRT, Droid Razr Maxx, Droid Razr, and Droid 4
	2014	Photon Q 4G LTE, Droid Razr Maxx HD, Droid Razr HD, Droid Razr M, and Droid 4
	2015	Moto X, Droid Maxx, Droid Mini, Moto X, and Droid Razr M
Nokia	2013	Lumia 900
	2014	Lumia, Lumia 920, Lumia 925, Lumia 521, Lumia 928, and Lumia 822
	2015	Lumia 1020, Lumia 1520, Lumia 925, Lumia 635, Lumia Icon, and Lumia 928
Samsung	2013	Galaxy S 3, Galaxy S 2 Skyrocket, Galaxy Note, Galaxy S 2, Galaxy Exhilarate, Focus 2, Rugby Smart, Galaxy S2 Epic 4G Touch, Epic 4G, Conquer 4G, Replenish, Galaxy Blaze 4G, Galaxy Nexus, Srtatosphere, and Droid Charge
	2014	Galaxy S4, Galaxy S4 Active, Galaxy S3, Galaxy Note , Galaxy Rugby Pro, Galaxy Victory 4G LTE, Galaxy S2, Galaxy Exhibit, ATIV Odyssey, Galaxy Stellar, and Galaxy Stratosphere 2
	2015	Galaxy S5, Galaxy S5 Active, Galaxy S4, Galaxy S4 Active, Galaxy Note , Galaxy S3, Galaxy S4 Mini, Galaxy Mega, Galaxy Rugby Pro, Galaxy S4 Zoom, Galaxy S5 Sport, ATIV S Neo, and ATIV SE
Sony	2013	Xperia ion and Xperia Play
	2014	Xperia Z
	2015	Xperia Z1S