Hi! I understand your Roamify eSIM is installed on your iPhone but it’s not working in the UK, even after restarting your device. Let’s work together to get it sorted.

Since you're on iOS, here are some steps tailored for your device to troubleshoot the issue:

1. Turn On Data Roaming
Go to Settings > Cellular (or Mobile Data) > Select your Roamify eSIM plan > Make sure "Data Roaming" is enabled. This lets your eSIM use international networks while you’re in the UK.

2. Manually Select the Network
Still in Cellular settings, turn off "Automatic" network selection and manually pick a UK carrier from the list. Sometimes automatic selection misses the right network.

3. Disable Other SIMs or eSIMs
If you have other physical SIMs or eSIM plans active, try turning them off temporarily to avoid conflicts.

4. Restart Your iPhone
Since you already did this, you can try it again after the above steps to ensure changes apply.

5. Check for iOS Updates
Make sure your iPhone is on the latest iOS version as updates can improve network compatibility.

6. Reset Network Settings (if necessary)
If the problem persists, go to Settings > General > Transfer or Reset iPhone > Reset > Reset Network Settings. This will erase saved WiFi passwords and cellular settings but can clear network bugs interfering with the eSIM.

Please do NOT delete your eSIM profile during troubleshooting; your plan will become invalid.

Try these steps one by one, and let me know at which step things stand or if you run into any trouble while doing them. We can explore deeper fixes if needed.

Are you able to access your Cellular settings now?