Can I get help from a local carrier store in China?
No. Local carrier stores in China are not familiar with our SIM cards and Wi-Fi routers and do not provide service. If you have any
FAQs
How do I add more data to SIM card and mobile Wi-Fi?
Adding data to your SIM card and mobile Wi-Fi on GreatWallSIM is simple.
When does the data plan start?
The data plan starts at 00:00 on the day of activation. For example, if you activate a 30-day data plan on June 8th, the plan
How do I get an invoice?
Please contact us with your order number and we will send you an invoice.
Is it safe to use GreatWallSIM?
We take every measure to ensure the security and privacy of your information. Your order details and personal data are encrypted and securely stored. GreatWallSIM
