Your comments

Hi Joachim, thanks for the answers !

I just put a Value : 1 to the MIP input (not sure of what should be passed, this is the index of the MIP map right ?) of my textures, but it don't seems to change anything : / 

I can upload the shader somewhere, I only have an HTC One X and a Nexus 7 to test.
Ok, I got a bit more time to investigate.
The Vertex Offset output seems to have an issue when using a Texture2D property. I can pass anything if want in it (using Uv coordinates + rotator for exemple) except a Texture2D that will instantly broke the shader on Android (at least on the HTC One X and the Nexus 7). 

Do you want me to post a link with the shader with/without the Vertex Offset ?