During network selection, GSM mobile equipment (such as mobile devices, tablets, etc.) displays information regarding the network, or networks, available and the country in which the network/s are operating.
This permanent reference document (PRD), details the nature, structure and handling of the “Mobile (Network) Codes and Names” (TS.25 formerly SE13), how it can be submitted by Mobile Network Operators and how it is presented and made available to those wishing to receive the data. The primary purpose of collating and making available the network codes and names is to provide terminal vendors with network details to be displayed to users on mobile devices on the display or within the network selection menu.
In addition, entries for (U)SIM headers (part of the ICCID) are collected and presented to aid SIM Card identification.
GSMA Members can update their own details within Member Gateway. For more details download TS.25 version 8.0 of later.