The Device Model Targeting API has strict requirements for the format of the model name. This article explains what those requirements are

Android

On Android, we are looking for the industrial name for the device. For example, rather than "Samsung Galaxy S3", we require "GT-I9300"

A good resource to map consumer names to industrial names is the list of Google Play supported devices. The value we are looking for can be found in the "Model" column

iOS

On iOS, we are looking for the consumer facing names. Here is the full list of model names that is supported by this API: 

iPad 1

iPad 2

iPad 3

iPad 4

iPad Air

iPad Air 2

iPad Pro

iPad mini

iPad mini 2

iPad mini 3

iPad mini 4

iPod touch 1G

iPod touch 2G

iPod touch 3G

iPod touch 4G

iPod touch 5G

iPod touch 6G

iPhone 1G

iPhone 3G

iPhone 3GS

iPhone 4

iPhone 4S

iPhone 5

iPhone 5c

iPhone 5s

iPhone 6

iPhone 6 Plus

iPhone 6s

iPhone 6s Plus

iPhone SE

iPhone 7

iPhone 7 Plus

iPhone 8

iPhone 8 Plus

iPhone X

iPhone XS

iPhone XS Max

iPhone XR