The Oppo A55s 5G is a ColorOS-based Android phone sold in several regional versions. Some Oppo A55s 5G variants support eSIM, while others may be physical-SIM only, so this guide applies to eSIM-capable models where eSIM appears under Settings > Mobile network.
For travel, an iRoamly eSIM lets you add a data plan before or during a trip without replacing your main SIM. The QR code method is usually faster, but manual entry is useful if you are reading the setup details on the same phone or the camera cannot scan the code.
This guide uses the ColorOS path Settings > Mobile network > eSIM > Add eSIM. Menu names can vary slightly by software version, region, or carrier firmware, so check for equivalent labels such as SIM card & mobile data, SIMs, or Download a SIM if your phone is on a different ColorOS build.
Before You Set Up Your iRoamly eSIM
Connect the Oppo A55s 5G to stable Wi-Fi before downloading the eSIM profile.
Make sure your phone is unlocked and that your specific Oppo A55s 5G variant supports eSIM.
Keep your iRoamly QR code, SM-DP+ Address, activation code, and any confirmation code ready.
Install the eSIM 1-2 days before travel when possible, but check your iRoamly plan details first. iRoamly plan validity starts from activation, and for many travel eSIMs the usable period can begin once the profile is installed or first connects to a supported destination network.
Do not delete the iRoamly eSIM after installation unless iRoamly Support tells you to. Many eSIM profiles cannot be downloaded again after removal.
iRoamly plans may be data-only. Voice calls and SMS depend on the specific plan, so check the plan details before relying on calling or texting.
Method 1: Install eSIM by Scanning a QR Code
Open Settings on your Oppo A55s 5G and tap Mobile network.
You should see the ColorOS mobile network page with SIM and eSIM settings.
Tap eSIM.
The phone should open the eSIM management page. If eSIM is missing, your regional model, carrier firmware, or current software build may not support eSIM.
Tap Add eSIM.
ColorOS should show options for adding a mobile plan.
Tap Scan QR code.
The camera scanner should open. Keep the iRoamly QR code on another screen or printed page.
Point the Oppo A55s 5G camera at the iRoamly QR code, then tap Download or Add when the iRoamly profile is found.
Wait on the download screen until ColorOS finishes adding the eSIM profile. Do not close Settings during this step.
Tap Done when the phone confirms that the iRoamly eSIM has been added.
You should return to the eSIM page, where the new iRoamly profile appears as an available mobile plan.
Method 2: Install eSIM Manually
Open Settings and tap Mobile network.
This starts from the same ColorOS network settings page used in the QR method.
Tap eSIM.
You should see the eSIM management page for downloadable SIM profiles.
Tap Add eSIM.
ColorOS should show the screen where you can scan a QR code or choose manual entry.
Tap Enter details manually or Need help? Enter it manually.
The manual entry form should appear. On ColorOS/Android eSIM setup, the fields normally use SM-DP+ Address, Activation Code, and sometimes an optional Confirmation Code.
Enter the iRoamly SM-DP+ Address and Activation Code, add the optional confirmation code only if iRoamly provided one, then tap Continue.
Use the exact details from your iRoamly order page or email. Do not add spaces unless the code includes them.
Review the detected iRoamly profile and tap Download or Add.
Keep the phone on Wi-Fi until the eSIM download completes.
Tap Done after the eSIM is added.
The iRoamly profile should now appear in the eSIM list.
How to Confirm Your iRoamly eSIM Is Installed
Go to Settings > Mobile network > eSIM.
Look for the iRoamly eSIM profile in the list. It may appear as iRoamly, Travel, Mobile data, or a carrier profile name depending on the destination network.
Tap the iRoamly eSIM profile and check that the profile is turned on.
If the profile has a toggle, it should be enabled before you try to use travel data.
Configure eSIM for Mobile Data
Open Settings > Mobile network and tap Mobile data.
The phone should show the available SIMs or eSIM profiles that can be used for data.
Select the iRoamly eSIM as the preferred mobile data line.
This tells the Oppo A55s 5G to use the travel eSIM for internet access instead of your primary SIM.
Open the iRoamly eSIM details and turn on Data roaming if your iRoamly plan or destination instructions require it.
Travel eSIMs often need roaming enabled to connect to partner networks. Leave roaming off for your primary SIM if you want to avoid unwanted roaming charges.
Turn off Wi-Fi briefly and open a webpage or map app to test mobile data.
If the page loads through the iRoamly eSIM, your travel data setup is ready.
Troubleshooting
Add eSIM is missing: confirm that your exact Oppo A55s 5G variant supports eSIM, update ColorOS, restart the phone, and check whether your carrier firmware disables eSIM.
QR code already used: do not delete the eSIM and try again. Contact iRoamly Support because many eSIM QR codes are single-use.
QR code will not scan: brighten the other screen, clean the camera lens, avoid reflections, or use manual entry with the SM-DP+ Address and activation code.
Manual entry fails: check every character in the SM-DP+ Address and Activation Code, then retry on Wi-Fi.
eSIM is installed but there is no data: select the iRoamly eSIM under Mobile data, enable Data roaming when required, turn airplane mode on and off, and test again in a covered destination.
Activation stays pending: wait a few minutes on Wi-Fi, restart the phone, and try again after arriving in the destination country if the plan activates only on a supported network.
Calls or SMS do not work: check the iRoamly plan details. Many travel eSIM plans are for mobile data only.
Conclusion
With your iRoamly eSIM successfully installed, your Oppo A55s 5G is ready to connect whenever your travel plan becomes active in a supported destination. Once connected, you can use mobile data for navigation, messaging, travel bookings, translation tools, and other everyday online services without spending extra time configuring your phone after arrival.
Preparing your travel connection before departure makes getting online much easier. Instead of searching for mobile service after landing, you'll be ready to access the internet whenever your plan is available, helping you start your trip with fewer interruptions.