To Turn On Data Roaming on Your Device
On Apple devices:
Open "Settings" and select "Mobile Service."
Under "SIMs," choose your eSIM.
Switch on "Turn on this line," then switch on "Data Roaming."
On Android devices:
Open "Settings" and select "Networks & Internet."
Choose "SIMs" and tap your installed eSIM.
Turn on "Use SIM," then turn on "Mobile Data," then turn on "Roaming."
Note: Steps may vary slightly depending on your device.