Thank you @Keith_Beddoe ,
I’ve called BT mobile as suggested, and they suggested same as you, min £5 on mobile cap and data roaming cap, as they said sometimes it might need to set it like that to be able to use plan abroad. So they suggested to turn on and off after cap activated 30minutes later, and to turn off automatic network selection and tried all the selection from the list, and if its not working, need to reset network. We even tried changing to 3G as we found information from this forum.
but unfortunately all didn’t work, still no signal service, so made more calls and we mentioned again that the simcard cannot be used even on husband device and husband simcard can be used in daughters phone, so problem is with simcard, so the bt adviser i talked with, he was checking with network department and found out eventhough on the bt adviser system/mybt app saying roaming is active, but behind the screen (network department) said its not yet open/active, so network department requested it to be opened, and should be activated in 10minutes. Finally there’s network signal on daughter’s phone after 10minutes, but still cannot be used for calls/text/data until the next day (which is today). It can be used now, yay. So hopefuly this could be helpful to someone else, once you option out its not the device problem, it could be network error behind bt system. Bt mobile advisers I talked with, all were really helpful.
