The Vivo V40 lite is sold in different regional versions, including 4G and 5G variants, and eSIM availability can depend on the market, carrier firmware, and software build. This guide applies only to Vivo V40 lite units running Funtouch OS that show an Add eSIM option under the SIM settings menu.
For travelers, an iRoamly travel eSIM is useful because it can be installed before departure and used for mobile data at the destination without swapping a physical SIM. The cleanest method is scanning the iRoamly QR code, but manual entry is useful when the QR code is on the same phone or the camera cannot scan it.
The steps below use the Vivo/Funtouch OS path Settings > Mobile network > SIM management > Add eSIM. Menu names may vary slightly by Funtouch OS version, region, and carrier variant. If your Vivo V40 lite does not show Add eSIM, that unit may not support eSIM installation.
Before You Set Up Your iRoamly eSIM
Connect the Vivo V40 lite to stable Wi-Fi before starting the install.
Make sure the phone is unlocked and that Add eSIM appears in Settings > Mobile network > SIM management.
Keep the iRoamly QR code, SM-DP+ Address, and Activation Code ready from your iRoamly order email or account page.
Install the iRoamly eSIM 1-2 days before travel if the plan allows it, but confirm the plan timing first. iRoamly plan validity starts from activation, and the exact activation trigger can vary by plan.
Do not delete the iRoamly eSIM after installation unless iRoamly support tells you to. Many travel eSIM profiles cannot simply be reinstalled after removal.
Check the plan details before relying on calls or texts. Many travel eSIM plans are data-only, and voice/SMS availability varies by plan.
Method 1: Install eSIM by Scanning a QR Code
Open Settings on the Vivo V40 lite and tap Mobile network.
You should see the Funtouch OS mobile network page with SIM and data options.
Tap SIM management.
The phone should show the installed physical SIM cards and any available eSIM controls.
Tap Add eSIM.
If Add eSIM is missing, stop here and check whether your exact Vivo V40 lite regional model supports eSIM.
Choose Scan QR code when the eSIM setup screen opens.
The camera scanner should appear, ready to read an eSIM QR code.
Scan the iRoamly QR code from another screen or printed copy, then tap Download or Add when the phone shows the iRoamly eSIM profile.
Keep the phone on Wi-Fi and wait until the download finishes.
Tap Done when Funtouch OS confirms that the eSIM has been added.
The iRoamly eSIM should now appear in SIM management, usually as a new eSIM line that can be renamed.
Method 2: Install eSIM Manually
Open Settings and tap Mobile network.
Use this same starting point even if you already tried the QR method.
Tap SIM management.
This is where Funtouch OS lists SIM slots, eSIM profiles, and setup controls when the model supports eSIM.
Tap Add eSIM.
If the phone does not show Add eSIM, manual entry will not be available on that unit.
Tap Enter details manually or Use activation code on the QR-code screen.
The manual setup page should open with fields for the carrier activation details.
Enter the SM-DP+ Address and Activation Code exactly as iRoamly provides them. If a Confirmation Code field appears, leave it blank unless iRoamly supplied one.
After the details are accepted, the phone should show the iRoamly eSIM profile ready to download.
Tap Download, Add, or Activate, then wait for the eSIM profile to finish installing.
Keep Wi-Fi connected and do not leave the setup screen while the profile is downloading.
Tap Done after Funtouch OS confirms that the eSIM has been added.
The iRoamly line should now be visible in SIM management.
How to Confirm Your iRoamly eSIM Is Installed
Go to Settings > Mobile network > SIM management.
Look for a new eSIM line or iRoamly profile under the SIM list. Rename it to iRoamly if Funtouch OS lets you edit the label.
Tap the iRoamly eSIM line and check that it is turned on.
The line details page should show the eSIM enabled, with options for mobile data and roaming depending on the software version.
When you are in the destination country, turn off Wi-Fi briefly and open a webpage or map app to test mobile data.
Do not use SMS or calling as the main test unless your iRoamly plan specifically includes voice or text service.
Configure eSIM for Mobile Data
Open Settings > Mobile network and tap Default SIM for data or Data SIM.
Choose the iRoamly eSIM as the mobile data line when you want travel data to use the iRoamly plan.
Open the iRoamly eSIM line settings and turn on Data roaming if the destination plan or local partner network requires roaming.
Travel eSIMs often need roaming enabled because the plan connects through partner networks outside your home country.
If your phone has a primary physical SIM, keep calls and SMS on the primary SIM unless your iRoamly plan includes those services.
This helps avoid unwanted call or text routing while using iRoamly for travel data.
Check the status bar after arrival and confirm that mobile data works through the iRoamly line.
If the phone connects to a partner network but data does not load, restart the phone and recheck Data roaming.
Troubleshooting
Add eSIM is missing: confirm the exact Vivo V40 lite variant, region, and carrier firmware. Some units may support only physical SIM cards.
QR code will not scan: brighten the other screen, clean the camera lens, avoid glare, or use manual entry with the iRoamly SM-DP+ Address and Activation Code.
QR code says it has already been used: do not delete the eSIM or keep retrying. Contact iRoamly support because many eSIM QR codes are single-use.
Activation is pending: keep Wi-Fi connected, wait a few minutes, and restart the phone if the status does not change.
The eSIM installed but there is no data: select the iRoamly line for mobile data, enable Data roaming, confirm you are in the covered destination, and restart the phone.
The iRoamly line appears but calls or SMS do not work: check the plan details. Many iRoamly travel eSIMs are for data only.
Manual details are rejected: re-enter the SM-DP+ Address and Activation Code exactly, with no extra spaces. Leave Confirmation Code blank unless iRoamly supplied one.
Conclusion
Your iRoamly eSIM is now installed on your Vivo V40 lite and ready to use when your travel plan becomes active. Once you're in a supported destination, you can enjoy mobile data for navigation, messaging, travel bookings, translation, ride-hailing, and other everyday online services without needing any additional installation.
Preparing your travel connectivity in advance means you can spend less time setting up your phone after arrival and more time enjoying your trip. With your Vivo V40 lite and iRoamly eSIM ready to go, staying connected abroad becomes simple, reliable, and convenient.