Accelerometer not working well in all devices

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http://stackoverflow.com – This is a pretty open question. We developed a game for android using Andengine. Zombies come at you and they "grab" you, and to shake them off, you have to move the device. There is a bug present in several devices where one cannot shake the zombies by moving the device. We cannot replicate this error on the devices we have for testing the game. So my question is: Could there be a possibility of the hardware not being fully compatible with certain android functions ? I mean there is a sea of android devices out there. I ask this question in order to have a better idea of how to proceed. S (HowTos)