My phone cant run my game?

I have published my game to the google play store. Its on the playstore on my computer, but not on my phone. I have a galaxxy s2 GT-19100 I can find it on google plays site on my phones web, but it says that it cant install on my device. When i go to my developer site on developer.android.com it says that you can install the game on 183 different devices. Is that a small amount or normal? When i searh after my device between all the 183 the gt.19100 isnt there, but there is some other gt-(numbers) versions of the galaxy s2. I find this pretty strange since i can install all kind of games on my phone. What is wrong and how do i fix it? Is it something on unity or on my developer profile?