Note: The unlocked phone can be used directly, and the locked phone needs to be registered to receive the US dollars. Wait for Chaoxue to announce the baseband bug. You don't necessarily have to buy Chaoxue's esim package.
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Open the AppStore and search for RedteaGO to download and open it.
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Click on the SIM card icon in the middle of the bottom to enter the login page.
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Click on "Register" and then select email registration.
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Enter the invitation code: 9BGF0001 (No money will be given if not entered)
(The invitation code will give you 3 US dollars, which can be used for free esim) -
After returning to the homepage, select the Hong Kong option (cheaper), and then use the gifted US dollars to purchase the esim package.
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After the purchase is completed, click the "Activate" button to activate it.