How to Activate Your DataMax eSIM

Activate your OneSimCard DataMax eSIM in minutes. Follow this step-by-step guide to get connected instantly in 200+ countries.

Get Your DataMax eSIM

Quick Answer: To activate your DataMax eSIM, scan the QR code, enable the eSIM profile, turn on data roaming, set the correct APN, and make sure your data plan is active for the country in which you are located.

How to Activate Your DataMax eSIM (Step-by-Step)

Purchase your DataMax eSIM and receive your QR code by email. Your QR code is also available in the "Recharge" page of your online account. Login to your account
Open your phone settings and go to Cellular / Mobile Network
Add eSIM and scan the QR code
Enable the eSIM profile on your device
Turn Data Roaming ON
Set APN to OSC (if required)
Select the eSIM as your mobile data line
Make sure your data plan is active for the country in which you are located
Restart your device

How to Activate eSIM on iPhone and Android

iPhone Setup

Video instructions
Go to Settings → Cellular
Tap “Add eSIM”
Scan QR code
Turn Data Roaming ON
Select eSIM for Cellular Data
Video instructions for installation if you don't have a second device to view QR code

Android Setup

Video instructions
Go to Settings → Network & Internet
Select Mobile Network
Add eSIM
Scan QR code
Enable data roaming
Video instructions for installation if you don't have a second device to view QR code

APN Settings for DataMax eSIM

Your APN tells your phone how to connect to the data network.

OSC

If your data is not working, double-check this setting first.

Why Your DataMax eSIM Might Not Be Working

Data roaming is turned OFF
APN is missing or incorrect
No data package active for the country in which you are located
Wrong SIM selected for mobile data
Device is not eSIM compatible or unlocked

Stay Connected Anywhere

Get instant mobile data in over 200 countries with OneSimCard DataMax eSIM. No roaming fees. No physical SIM required.

Activate Your eSIM Now

Frequently Asked Questions

How long does it take to activate a DataMax eSIM?

Activation usually takes just a few minutes after scanning the QR code and enabling the correct settings.

Do I need Wi-Fi to activate my eSIM?

Yes, you typically need Wi-Fi or an internet connection to download and install the eSIM profile.

Why is my eSIM connected but not working?

This is usually caused by incorrect APN settings, data roaming being turned off, or no active data package for the country in which are located.

Can I activate my eSIM before traveling?

Yes, you can install your eSIM before your trip and activate data when you arrive at your destination.