Platform version - devices

Hi ,
I was wondering if there is some hardcoded mapping between the “platform version” to specific device type ?
For example , when I choose p.v 7.1 , it seems that appium server launches with iphone 5s
The error I’m getting is "Could not find a device to launch. You requested ‘iPhone 5s (7.1 Simulator)’, but the available devices were: "iPad Retina (7.1 Simulator)"

Any idea how to overcome the device issue ?

I’m using Appium 1.3.5