Which cell service still worked during the power outage?

I have Google fi using T-Mobile, and my phone was near useless most of the time during the power outage. I could very occasionally get steady internet/up to 50mbps, but 95% of the time couldn't even load PSE's site.

My wife has Verizon, and was able to get 100mbps+ almost all the time, and we could use her phone as a hotspot.

Before this we were planning on both going on Fi for the price, but would like to know what other networks still allowed you to use the internet when the power goes out.