We have had phones and tablets come in with the same type of issues. We have a new antenna coming in for one to see if that helps at all. I will keep you updated on the outcome of that. But right now it is looking like we are at the mercy of apple until they release a new update to fix the issue.
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UPDATE:
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the device that we had come in we replaced the two lower antenna's being the wifi antenna and the Bluetooth antenna and it worked perfectly no issues. This may or may not be the case for every iPad that you are experiencing this problem with.
We have had phones and tablets come in with the same type of issues. We have a new antenna coming in for one to see if that helps at all. I will keep you updated on the outcome of that. But right now it is looking like we are at the mercy of apple until they release a new update to fix the issue.