规则说明

MTK平台的设计，优先级：（MD）CIEV > Eons > Nitz > xml

功能代码说明

【笔记】Android Telephony 漫游SPN显示定制（Roaming Alpha Tag）-CSDN博客

日志分析

关键字：lookupOperatorNameXXXX

TS.25 获取PLMN的值 AT&T

12-22 09:51:57.234020  2001  2001 D MtkRILJ : lookupOperatorNameMVNO plmn name update to TS.25/MVNO: AT&T

NITZ下发后上报 AT&T...1

12-22 09:51:57.417810  2001  2001 D MtkRILJ : lookupOperatorNameNitz plmn name update to Nitz: AT&T...1

EONS上报，Telephony 获取到PLMN 值 AT&T

12-22 09:52:01.386525  6399  6423 I AT      : [0] AT< +EONS:1,0,"AT&T",0,"" (RIL_CMD_RT_7, tid:491198414080)
12-22 09:52:01.386964  6399  6424 D RmcNwHdlr: [0] Return EONS Operator Name: 310410 AT&T
12-22 09:52:01.390394  2001  2001 D MtkRILJ : lookupOperatorNameEons plmn name update to Eons: AT&T

上层xml用carrierconfig配置中的carrier_name_string

    <carrier_config cid="10021" name="ATT 5G">
        <boolean name="carrier_name_override_bool" value="true"/>
        <string name="carrier_name_string">AT&amp;T</string>
    </carrier_config>