I hate to say this but even if my iPad Air 2 does not make that noise today or hasnt since a returned my last one Does not mean I will not start to have problems later on. I was told, by Apple Care, since I bought my first iPad Air 2 online I have thirty days instead of just 14 days. When I returned my first and then second I confirmed that at the store level as well. The second time I returned my first exchange they insisted that i set it up there at the store they just sat there and watched me set up the new one, I was replaceing the first exchanged iPad Air 2 with. This was meanless because the popping noise is intermediate but i did kinda hope it popped as i was setting it up. They were not very nice, they acted as if i was hearing things and their tone was very condescending. They being a supervisor and manager... There are two versions of the iPad Air 2 one is iPad 5,3 & the other is iPad 5,4... Don't know the difference other than what I saw on the benchmark tests. Either way they will have to continue to replace or offer a refund because I beleive in the system. Good luck everyone and enjoy the holidays...