1e41f4b71Sopenharmony_ci# telephony_data.h 2e41f4b71Sopenharmony_ci 3e41f4b71Sopenharmony_ci 4e41f4b71Sopenharmony_ci## 概述 5e41f4b71Sopenharmony_ci 6e41f4b71Sopenharmony_ci为电话蜂窝数据定义C接口。 7e41f4b71Sopenharmony_ci 8e41f4b71Sopenharmony_ci**库：** libtelephony_data.so 9e41f4b71Sopenharmony_ci 10e41f4b71Sopenharmony_ci**系统能力：** SystemCapability.Telephony.CellularData 11e41f4b71Sopenharmony_ci 12e41f4b71Sopenharmony_ci**起始版本：** 13 13e41f4b71Sopenharmony_ci 14e41f4b71Sopenharmony_ci**相关模块：**[Telephony data](ndk-apis-telephony-data.md) 15e41f4b71Sopenharmony_ci 16e41f4b71Sopenharmony_ci 17e41f4b71Sopenharmony_ci## 汇总 18e41f4b71Sopenharmony_ci 19e41f4b71Sopenharmony_ci 20e41f4b71Sopenharmony_ci### 函数 21e41f4b71Sopenharmony_ci 22e41f4b71Sopenharmony_ci| 名称 | 描述 | 23e41f4b71Sopenharmony_ci| -------- | -------- | 24e41f4b71Sopenharmony_ci| [OH_Telephony_GetDefaultCellularDataSlotId](ndk-apis-telephony-data.md#oh_telephony_getdefaultcellulardataslotid) | 获取默认移动数据的SIM卡接口。 | 25