It appears that carriers in the U.S. and aboard aren’t happy with iCloud Private Relay. The setting, released with iOS 15, likely interferes with surveillance of customers. A report from 9To5Mac says that T-Mobile has begun blocking the feature.
The change does not appear to be network-wide just yet, but rather it appears T-Mobile is in the process of rolling it out. This means that some users might still be able to use iCloud Private Relay when connected to their cellular network – at least for now.
Very shady behavior. I haven’t been using Private Relay because it overrides my DNS. The good news is that carriers can’t prevent you from changing your DNS settings.
Check It Out: T-Mobile Blocks iCloud Private Relay for Customers in United States
This is a clear violation of the California Internet Consumer Protection and Net Neutrality Act of 2018 (California Net Neutrality). It may also violate Federal FFC rules, currently being revised in support of Net Neutrality.