animations do not work on some android devices

I have created a little game with some characters created in blender. For example I have a walking animation created for the character. I exported the game to android and tested it on a very cheap android tablet. The game worked, the caracter "walked" over the screen but did not play the walking animation. When I testet it on my Sony Xperia phone everything was fine.

Can anyone tell if it is possible, that animations are played on some devices and on others not? Has this something to do with the GPU build into that device? How can I find out, if a device plays animations or not - so it might be possible to create a fallback mode for these devices?