Apparently in this case, T-Mobile caved and Google didn't:

> The DHS also sought and obtained six months of phone records for Fort from T-Mobile, which included records for more than 10,000 calls and text messages. Fort was not notified the government was seeking the records until mid-July, when government lawyers produced them to her lawyers. Fort’s lawyers wrote in a filing this week they were “stunned” to see the government had unilaterally been able to obtain a log of her communications after a judge had warned them about obtaining records about a journalist.

...

> In Fort’s case, Google did not comply with the summons for any of the accounts. The company responded to the DHS by saying it had not offered evidence of how it was related to a customs investigation.

> A Google spokesperson said the company reviews each request for data it gets to ensure it is legal and pushes back when it is too broad or doesn’t follow the correct process.