Most of the IOS Devices are compitable with eSIM, 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.
Your eSIM should automatically connect to a supported mobile network.