The desired behaviour is as follows: When not roaming: * evaluate 1st byte of EF_SPN: (a) 0x01 == showing the registered PLMN is required: display the content of EF_PNN if one is defined in EF_OPL for the network code of the registered PLMN. (Can fall back to a default operator name.) (b) 0x00 == showing the registered PLMN is not required: do not display any network name * display the entire SPN string if one is defined in EF_SPN. * display the Idle Mode Text if one is set up by the ICC via STK. When roaming: * display the content of EF_PNN if one is defined in EF_OPL for the network code of the registered PLMN. (Can fall back to a default operator name.)

As for emulator, we have had EF_SPN[1] and EF_PNN, but EF_SPDI(Service Provider Display Information) is still left undefined, neither does EF_OPL. Besides, all these EF files are statically defined and can't be modified at runtime. We'll have to fix ENABLE_DYNAMIC_RECORDS[2] feature if we want to test multiple combinations of all these EF files. [1]: https://github.com/mozilla-b2g/platform_external_qemu/blob/master/telephony/sim_card.c#L407 [2]: https://github.com/mozilla-b2g/platform_external_qemu/blob/master/telephony/sim_card.c#L17

It seems the not-roaming part duplicates bug 793111?