To which operators do the SIM cards connect?

For the latest coverage details for all countries, see here: https://www.thingsmobile.com/business/coverage/coverage

If you would like detailed information about the coverage in your area for the operators to which the SIM cards connect, we recommend that you visit https://www.opensignal.com/networks and follow the instructions.
Things Mobile currently has coverage with the following operators in Italy:
Vodafone GPRS 4G
WindTre GPRS 3G 4G
ILIAD 3G
TIM GPRS 3G 4G