How do I turn on and use Airplane Mode?
Press and hold the top icon in Control Center that looks like an airplane. Alternatively, go to 'Settings' > 'Airplane Mode'. When Airplane Mode is enabled, Bluetooth, Wi-Fi, Cellular Data are turned off. (Page 57)
From the official Realme Rmx3997 C65 5G 128gb Smartphone manual, page 57
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