Android preloadEffect() issue!

Hi, we are working on a game and preloading all sound effects. like below
SimpleAudioEngine::sharedEngine()->preloadEffect(“sound.mp3”);
It is working fine in most Android devices
like samsung S2, S3 and S4
but in some devices it takes too long(approx. 2 to 5 minutes) to load.
like HTC-ONE, Galaxy Nexus I9250.
Please suggest me possible solutions. Thanks