Hello! I understand you're encountering an error stating “device not authorized: please contact merchant to register” while trying to print with WalkPrint on your iPhone. Let’s see if we can resolve this together.

First, could you provide a bit more information? Have you previously printed from this device, or is this the first time you’re trying to use WalkPrint? Additionally, have you set up your account with WalkPrint, and are you logged in properly?

Once I have that context, I can guide you through some steps to get this sorted out!

I am logged in and have installed and reinstalled on two different iphones and neither work

Thank you for the details! Since you've already installed and reinstalled the WalkPrint app on two different iPhones and are still facing the same issue, let’s try a few more troubleshooting steps to see if we can address the “device not authorized” error.

1. Check Printer Registration: Sometimes, the printer you’re trying to use may not be registered under your account. You can check this by going to the “Printers” section within the WalkPrint app. Make sure your printer is listed and registered under your account.

2. Update the App: Ensure that you have the latest version of the WalkPrint app installed. You can check for updates in the App Store and install any available updates. WalkPrint App on the App Store.

3. Device Settings:
- Go to Settings on your iPhone, select Bluetooth, and make sure your printer is connected.
- Also, navigate to Settings > Privacy > Local Network and ensure that WalkPrint is allowed to access the local network.

4. Network Connection: Ensure that both your iPhones and the printer are connected to the same Wi-Fi network. Sometimes, printers require being on the same network for authorization.

5. Contact Support or Merchant: If none of the above steps resolve the issue, it may be best to contact WalkPrint support directly for assistance with device registration. You can reach out via email at [email protected].

Please follow these steps and let me know if you’re able to print successfully after trying them. Are you satisfied with the solutions I've provided so far?