Some Samsung Galaxy devices are not eSIM-compatible, our 7G app will notify you if your device is not e-sim compatible. Before the purchase.
If your device supports eSIM follow the steps below.
Fast Method (Recommended):
On Top Bar Click Fast.
Click Install.
Than Click Allow.
. 
After installing give the eSIM a new label:
1. Tap label for travel
2. Name it 7G eSIM
3. Set default line to 7G eSIM
4. Set your iMessage & Facetime to primary
5. Set your cellular data to 7G eSIM.
After you installed the eSIM on the iphone device and you arrived at your destination , it's time to enable cellular data and data roaming.
1. Open Settings , Tap Cellular
2. Tap on 7G eSIM
3. Enable cellular data.
4. Tap data roaming , enable it.
Step 5 - Set APN (Optional)
CHECK if you need to update your APN by opening the 7G app and viewing your eSIM.
If the message displayed in the APN field reads The APN is set automatically, no further action is required.
If there is text in the APN field, you must update your APN manually.
GO back to Settings.
TAP Cellular.
TAP 7G eSIM.
TAP Cellular Data Networks.
ENTER the new APN in the APN field.
Your eSIM should automatically connect to a supported mobile network.