We recently pushed an updated mobile-broadband-providers package to PureOS that is “AweSIM-aware” and will list the proper APN to use when the SIM is inserted. As far as 4G calls, they work, however if you are adding AweSIM after the fact to your Librem 5, you will need to enable VoLTE. When we ship L5 orders that include AweSIM we set this up now, but we don’t set up VoLTE by default because depending on the provider a customer chooses, it is more likely to result in a phone that can’t make phone calls, than leaving it off.