✅ Set Up Your SIMs Correctly
- Set your physical SIM (domestic) as [Primary]
- Set your eSIM plan as [Secondary] during installation
⛔️ Turn Off Data Switching
This ensures your device won’t switch back to the domestic SIM for data without your knowledge.
Apple
1. Go to [Settings] > [Cellular/Mobile Service]
2. Tap [Cellular Data/Mobile Data]
3. Toggle off [Allow Cellular Data Switching]
Samsung
1. Go to [Settings] > [Connections] > [SIM manager]
2. Toggle off [Data switching]
☎️ Ask Your Carrier to Block Roaming
You can also contact your domestic carrier to block international roaming on your physical SIM entirely.
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