https://www.techdirt.com/articles/20171018/11381238432/supreme-court-agrees-to-hear-case-involving-us-demands-emails-stored-overseas.shtml

The Supreme Court has granted the government's request for review of Second Circuit Appeals Court's decision finding Microsoft did not have to turn over communications stored overseas in response to US-issued warrants.

This is a pretty quick turnaround as far as tech issues go. The Supreme Court is finally willing to take a look at the privacy expectation of third party phone records (specifically: historical cell site location info), following years of courtroom discussion... which follow years of Third Party Doctrine expansion.