It would be interesting to see the geolocation data retention and sharing policy, and what granularity of data is retained and for how long, contrasting something that is purely a MVNO on some other facilities based carrier's network, vs a similar SIM card and phone activated directly with one of the facilities based last mile network operators (TMobile-Sprint, ATT, Verizon and the smaller regional players like US Cellular).

On Tue, 19 Jul 2022 at 17:04, Sean Donelan <sean@donelan.com> wrote:

FCC has fixed its website document management system, and has all the
letters of inquiry posted.

In the letters of inquiry, Chairwoman Rosenworcel asks about their
policies around geolocation data, such as how long geolocation data is
retained and why and what the current safeguards are to protect this
sensitive information. Additionally, the letters probe carriers about
their processes for sharing subscriber geolocation data with law
enforcement and other third parties’ data sharing agreements. Finally,
the letters ask whether and how consumers are notified when their
geolocation information is shared with third parties.

https://www.fcc.gov/document/rosenworcel-probes-mobile-carriers-data-privacy-practices

AT&T Services
Best Buy Health
Charter Communications
Comcast
Consumer Cellular
C-Spire
DISH Network
Google
H2O Wireless
Lycamobile
Mint Mobile
Red Pocket
T-Mobile
U.S. Cellular
Verizon