[Install eSIM]
1. Open the QR code attached to your reservation in the Trip.com app and print or save it to another device in advance. (iOS 17 and above can save it directly to your phone.)
2. In Settings, open Mobile Data (iOS) or SIM Management (Android).
3. When your phone is connected to the internet, tap Add Mobile Plan (iOS) or Add New SIM Card Management (Android) and scan the QR code to install it.
4. If you can't scan the code, enter the SM-DP+ Address and Activation Code from your reservation receipt to install it.
5. If steps 3/4 fail, your phone may be locked by your local carrier (unable to use other carriers' networks). Please contact your carrier to unlock it before using the eSIM.

[Using eSIM]
1. Turn off your primary SIM card and turn on the eSIM network switch.
2. Enable Mobile Data (iOS) or SIM Card (Android).
3. Turn on Data Roaming.
4. If you still can't connect to the internet after setting the above settings, please set the APN and restart your phone. For more information, please refer to the information below.

[About APN]
1. If you purchased an eSIM that covers multiple countries/regions and cannot connect to the internet after arriving in a new area, please manually switch the APN (it should switch automatically under normal circumstances).
2. Setup steps:
iOS: Settings - Mobile Services - Mobile Data Network
Android: Settings--Network & Internet--Mobile Network--Access Point Name (APN)--New APN or Edit APN
3. Enter the APN: mobile.three.com.hk
4. Restart your phone.