If the NFC card is not working on your smartphone, there are a few troubleshooting steps you can try:

• Ensure NFC is enabled: Go to your device's settings and make sure that NFC is enabled. Look for the NFC option under the "Connections" or "Wireless & Networks" settings. Toggle the NFC switch to turn it on.
• Check for compatibility: Verify that your smartphone is NFC-enabled and compatible with the specific NFC card you are trying to use. Some older or budget smartphones may not have NFC functionality, so it's important to confirm compatibility.
• Remove any obstructions: Make sure there are no physical obstructions between your smartphone and the NFC card. Remove any cases, covers, or other objects that may interfere with the NFC signal.
• Position the NFC card correctly: Ensure that you are placing the NFC card in the correct position on your smartphone. The NFC antenna is usually located on the back of the phone or near the camera module. Experiment with different positions to find the optimal placement for successful NFC communication.
• Clean the NFC card: If the NFC card has accumulated dirt, dust, or smudges, it may affect communication. Gently clean the NFC card with a soft cloth to remove any debris.
• Restart your smartphone: Sometimes, a simple restart can resolve temporary software glitches or conflicts. Try restarting your smartphone and then attempting to use the NFC card again.
• Update software: Ensure that your smartphone's operating system and NFC-related apps are up to date. Software updates often include bug fixes and improvements that can enhance NFC functionality.
• Test with another NFC card: If possible, try using a different NFC card to see if the issue persists. This can help determine if the problem lies with the NFC card or your smartphone.
• Contact support: If none of the above steps resolves the issue, it may be necessary to contact the manufacturer's support or your smartphone's customer support for further assistance. They can provide specific troubleshooting steps or advise on any known issues related to NFC functionality on your device.

Remember, the availability and performance of NFC can vary depending on the device, NFC card, and software compatibility.

If you receive an error message stating "This email cannot be used" when trying to use a specific email address, it indicates that there may be an issue with using that email address for the intended purpose. Here are a few possible reasons and solutions:

Email already registered: The email address you are trying to use may already be associated with an existing account. Check if you have previously registered with that email address or if someone else may have registered it. If it's your email, try recovering the account or using a different email address if possible.

Invalid email format: Ensure that you have entered the email address correctly, following the proper format (e.g., example@example.com). Double-check for any typos or missing characters. If you're certain the email format is correct, move on to the next step.

Restrictions or limitations: The platform or service you are trying to use may have specific restrictions or limitations on the types of email addresses that can be used. For example, some platforms may only accept email addresses from certain domains or block disposable email addresses. Review the platform's terms and conditions or contact their customer support for clarification.

Server or system issue: It's possible that the error message is a result of a temporary server or system issue on the platform's end. In such cases, try again later or contact customer support to report the problem and seek assistance.

Contact customer support: If none of the above solutions resolves the issue, reach out to the platform's customer support for further assistance. Provide them with the specific error message and details about the situation, and they should be able to guide you through the troubleshooting process or provide a resolution.

It's important to note that the specific cause and solution for the "This email cannot be used" error message may vary depending on the platform or service you are encountering it with. Refer to the platform's documentation or contact customer support for accurate and up-to-date information related to this specific error message.

To add your digital business card to your iPhone home screen as a shortcut, you can follow these steps:

• Ensure that you have your digital business card accessible on your iPhone. This can be through a dedicated app, a digital business card file, or a website link.
• Open the Safari web browser on your iPhone and navigate to your digital business card or the webpage where your business card is located.
• Tap on the share icon at the bottom center or top right corner of the Safari browser window. It looks like a square with an arrow pointing upwards.
• In the share menu that appears, scroll down and tap on the "Add to Home Screen" option. This will bring up the Add to Home Screen interface.
• Customize the name for the shortcut if desired. You can edit the name displayed for the shortcut on your home screen.
• Tap the "Add" button at the top right corner of the screen. This will add the shortcut to your home screen.
• Exit the Safari browser and return to your home screen. You should now see the shortcut representing your digital business card.
• Tap the shortcut icon to open your digital business card directly from your home screen whenever you need to view or share it.
• By adding your digital business card as a shortcut on your iPhone home screen, you can easily access and share it with others without the need to open a specific app or navigate through multiple screens.

Please note that the above instructions are specific to Safari and the iOS operating system. If you are using a different web browser or have a different iOS version, the steps may vary slightly. Additionally, some dedicated digital business card apps may offer their own options for adding shortcuts to the home screen. In such cases, consult the app's documentation or support resources for specific instructions.

To add your digital business card to your Android home screen as a shortcut, you can follow these general steps:

• Make sure you have your digital business card saved or accessible on your Android device. This could be through a dedicated app or a digital business card file.
• Navigate to the screen where you want to add the shortcut. This could be your home screen or any other screen on your device.
• Tap and hold on to an empty space on the screen. This action will typically bring up options for customizing the home screen.
• Look for an option such as "Widgets," "Shortcuts," or "Add apps and widgets." The exact wording may vary depending on your device and launcher.
• In the widgets or shortcuts section, scroll through the available options until you find the one for "Contacts" or "Direct Dial."
• Tap and hold the "Contacts" or "Direct Dial" widget and drag it to the desired location on your home screen.
• A list of contacts will appear. Search for and select your own contact entry or your digital business card entry.
• Release your finger to place the widget on the home screen. You should now see a shortcut representing your digital business card.
• Customize the appearance and size of the widget if desired. Some launchers allow you to resize and customize the appearance of the widget by tapping and holding it.
• Tap the widget to open your digital business card when you want to view or share it.

Please note that the specific steps and options may vary depending on your Android device model and the launcher you are using. If the above instructions do not match your device, consult the user manual or support resources specific to your device and launcher for more detailed instructions on adding shortcuts to your home screen.

To add your digital business card to a wallet app on your device, follow these general steps:

• Ensure that your digital business card is created and saved within your Digital Business Card (DBC) platform or app.
• Open the wallet app on your device. Wallet apps are commonly pre-installed on devices, such as Apple Wallet on iOS or Google Pay on Android, but you may also have other wallet app options available.
• Look for an option within the wallet app to add a new card or pass. The specific location and wording may vary depending on the app you are using.
• Choose the method to add a new card. Wallet apps typically offer various options, such as scanning a QR code, entering card details manually, or importing from an existing file.
• Select the option to scan a QR code if available. If your DBC platform provides a QR code for your digital business card, use the scanning function within the wallet app to scan the QR code and automatically add the card to your wallet.
• If scanning a QR code is not an option, you may need to manually enter the card details. In this case, copy the information from your digital business card, such as your name, contact information, and any additional details, and enter them into the wallet app fields accordingly.
• Follow any additional prompts or instructions provided by the wallet app to complete the process.

Once added, your digital business card will be accessible within the wallet app on your device. You can easily access and share it when needed, just like any other card or pass stored in your wallet app.