AT&T, T-Mobile, Verizon, Spectrum Mobile, Mint Mobile, Cricket Wireless, Visible, & Xfinity Mobile are the only phone carriers that currently support Nomorobo Max.
Unfortunately, if you have a different phone carrier, you will not be able to use Nomorobo Max. Carriers like Boost, Consumer Cellular, MetroPCS, etc. even though they're on the major networks, do not support Nomorobo Max and will not work correctly.
Please consider using Nomorobo Basic which can be used with every phone carrier. For a full list of compatibility requirements for Nomorobo Max click HERE