Where can I find ubirch documentation on a custom code to communicate with the SIM?
You can find the backend API documentation on https://developer.ubirch.com/api.html. You can also take a look the code used by the ubirch testkit as an example. Setting up a ubirch testkit might also be a good choice for getting acquainted with the ubirch functionality before starting to develop your own code.
1NCE Shop

Buy the 1NCE IoT Lifetime Flat now

Visit the 1NCE Shop and start connecting your IoT devices easily. Simply choose the desired type of SIM card, order your SIM cards, and fill out all required forms. After the payment has been approved you will receive your cards within two to three business days. 

ad_image