PinePhone Carrier Support
This page contains hints on setting up cellular network connectivity for specific carriers. For more general information, see Modem and Carrier Support.
According to this page, T-Mobile's primary frequency band for the United States is 12 (700ac MHz).
T-Mobile's bands and protocols are summarized on this page.
According to this page, Verizon's primary frequency band for the United States is 13 (700 MHz).
Verizon's bands and protocols are summarized on this page. However, it also says:
This carrier only accepts approved devices on its network. Even if a device supports some or all of the required frequencies for this carrier, it will not be able to connect unless the device is approved for this network. Check with the network operator to confirm whether a device is approved or not.
According to a "Verizon Agent" on a chat session:
We are the network operator and we will check whether the device will be compatible. For that, we need to have the device's ID (IMEI number). This will be on the device's purchase box; the device ID can also be found under device settings.
The FrequencyCheck model page does not list either Pine64 or the PinePhone.