Data Roaming not working

[PWED1]

I have the same contact and plan as my wife when we go abroad I get 5G when away from wifi but my wife gets the message no internet connection turn on data roaming. 
I have checked and it all matches my mobile but yet she still doesn’t get 5G

[XRaySpeX]

@PWED1 : Does she get 4G or 2G instead? Or is it she gets no signal at all?

Can she make calls & texts?

Often just rebooting the phone is the simple remedy. Also try selecting a network manually rather than auto.

Did she receive a Welcome text upon arrival?

Is she on contract or PAYG? Had she used that SIM for making calls or texts in UK before leaving to go abroad?

If she is on contract, did she activate roaming on her EE a/c before leaving UK by texting ROAMING to 150? Having a roaming billing add-on doesn't of itself activate roaming on your a/c. Having roaming activated on your EE a/c, not just on your device, is crucial to using your contract SIM abroad.

Otherwise if she is on contract she needs to call CS to get her roaming activated. Try calling CS on the Freephone no. in my sig. using a web-calling app over WiFi.