It would be interesting to know for sure, but the implosion took care of that. Had the carbon fiber merely cracked and eventually evened out PSI, have to believe iPhone 13/14 might have been pingable for a minute or two, with the battery access finally giving way, long enough to fix a smaller search area -- IF the mothership knew wtf to do in a catastrophic situ. And there's no evidence of that, which means Mr. Billionaire's estate is going to literally pay out millions to a Mooselimb front factory.
Below 700 feet there is no “merely cracked”. Any leakage, of any size, would have “dieseled” the contents of the sub-—including the plastic cell phones-—they’re done, Jim.