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teezeh February 21, 2020, 8:55am 3

Just dial #31#phonenumber to suppress CLIR for exactly that call.

More details at

en.wikipedia.org

Unstructured Supplementary Service Data

Unstructured Supplementary Service Data (USSD), sometimes referred to as "Quick Codes" or "Feature codes", is a communications protocol used by GSM cellular telephones to communicate with the mobile network operator's computers. USSD can be used for WAP browsing, prepaid callback service, mobile-money services, location-based content services, menu-based information services, and as part of configuring the phone on the network. USSD messages are up to 182 alphanumeric characters long. Unlike S...

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