Why can't the banking App be opened over Wi‑Fi when using NFC on the POCO C81 Pro?

If the banking App cannot be opened over Wi-Fi when using NFC on the POCO C81 Pro, this issue is most likely related to compatibility limitations of certain third-party banking applications rather than a hardware or system fault.
In some cases, banking Apps require a mobile data (SIM-based network) environment to complete secure authentication or NFC-triggered verification processes. When the device is connected only to Wi-Fi, the App can fail to establish a secure connection, resulting in the App not opening or not responding during NFC operations.
This issue can usually be temporarily resolved by inserting a SIM card and using mobile data instead of Wi-Fi when performing NFC-related banking actions. It is also recommended to check with the bank’s customer service for specific App requirements, as different banking applications will have different security policies and network dependencies.
The device’s NFC and Wi-Fi functions are working normally, and the limitation is due to third-party App compatibility. While simultaneously ensuring that the phone system is updated to the latest versions to ensure stable performance.