https://1nce.com/de-de/1nce-connect?gclid=CjwKCAjwrdmhBhBBEiwA4Hx5g_OBUbJeyE8lmBQgSIHTrNwBdG31GYRWJUSzvUsemPtKYjv5-oHkqxoCDvsQAvD_BwE
https://iot.telekom.com/de/netze-tarife/iot-tarife
einfach Prepaid?
https://www.discotel.de/