CSL eSIM / SIM Support Guide

This guide covers real-name registration, roaming setup, usage checks, top-up, and common troubleshooting for CSL eSIM and SIM cards.

Before Use

• Complete CSL official real-name registration when required by local policy or carrier rules.
• Confirm that your device supports eSIM if you purchased an eSIM product.
• Keep your QR code, ICCID, phone number, and order number safe.

Roaming Setup

1. Install the SIM or eSIM.
2. Enable mobile data.
3. Enable data roaming.
4. Wait for network registration, then test internet access.

Common Codes

• Check used data: *#149*8888*61#
• Check balance and validity: *#149*888#
• Try *109# if the phone number is not visible.