DeleteAll not working on android?

Hello,

I asked this question before but I am not getting any response to it :( We are as good as ready to send this project to a publisher but this problem is ruining this, and I can't find any information how to fix this.

I am working on a game, but even though PlayerPrefs.DeleteAll() works perfectly on my laptop with Android remote. If I build the game to my device, it doesnt work 90% of the time! How can I fix this? Or does anyone experience the same problem?

Thanks in advance

Alexander