I have a mobile provider that uses their network here in Norway, I got 171/40 and 22 ms ping. I'm in the countryside approximately 50 km from Oslo.
They're not anymore. Telenor in the Balkans was sold to PPF Group. They new owners raised prices a lot, and they have a license to call the company Telenor for 5 years.
About 16 KM outside Boston, I get 150/25 w/ a 40 ms ping on and iPhone X with intel modem on ATT LTE.