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Object does not appear in the target area

Hi, I'm trying to make a simple augmented reality by utilizing the target area with the vuforia target area creator application. Initially the AR application that has been made works well (can detect objects stored in the target area). But when I try to install the AR application on another smartphone, the object cannot be detected. I've tried it on several smartphones that have different android versions, but it only works on my smartphone. Redmi Note 8 (my smartphone): can detect objects Samsung A31: Unable to detect object Samsung A21: Unable to detect object Redmi 9: Unable to detect object Tekno Spark 7: Unable to detect object

can anyone help me in solving this problem? thanks

Hey there,

 

Can you share which Unity and Vuforia Engine version you're using? Also what features are you using? 

I'm also confusing what you mean with the 'target area' and 'vuforia engine area creator application'?

Thanks.