I have never had an issue with the service - on an iPhone SE 2020 currently and living in Queens NYC. Granted I’ve only had the service a little more than 1 year, during the pandemic, and I’m usually close to home, but the data speeds are usually ridiculously fast, and my call quality is excellent (never had a dropped call). I’ve also used the hotspot more than 20 times (when my spectrum wifi goes out) without issue....I just bought an iPhone 12 mini and I am hopeful that nothing changes with the quality of service I am used to with the new phone...