I have a Samsung Galaxy S Duos 2 S7582, and I have problem with sprites.
If a texture is imported from a file with a higher resolution it simply isn’t displayed in the device neither as an in-game sprite nor as a widget element.
I am not sure where the threshold is, but anything larger than 300*300 fails to appear on the device 
Hey Elathan,
Have you taken a look at our ‘Texture Guidelines for Mobile’ platforms documentation?
Textures for Mobile
Be sure you are using power of two texture resolutions and your project is targeted for the ‘Mobile/Tablet’ platforms. Let me know if you have any other questions or need additional help.
Thank you,
Thanks - I didn’t read that one, but somewhere I read that power of two textures are prefered so I actually used them already, and the target platform was set well too.
I found the problem however - the name of the 512*512 texture consisted a non-english character (‘ó’) accidentally. I know it’s a terrible practice and as a programmer I use english worlds all the time, but this one just avoided my attention. I will talk to the artist who actually made me the texture : )
So renaming the texture solved my problem.
Glad to hear you got your issue resolved. Gotta watch out for those foreign characters! Good luck with the rest of what you are working on, and let us know if you need any additional help.
Cheers,