If you are experiencing issues with the ArriveCAN app unable to submit your information, follow these steps to troubleshoot and potentially resolve the problem:

1. Check for App Updates
Open the App Store on your iPhone and search for the ArriveCAN app. If an update is available, install it. Keeping the app updated can resolve many common issues related to submission failures - learn more.

2. Clear App Cache
To resolve any issues with the app's cached data, you can try deleting the app and reinstalling it. This will clear any cached data that may be causing the submission problem.

3. Ensure Correct Information
Review all the details you have entered for accuracy. Make sure that the names, dates, and vaccination details are all correct. Double-check any uploads like vaccination proofs, as these must meet specific requirements regarding file size and format - learn more.

4. Try Different File Uploads
If you are submitting proof of vaccination, ensure that the images meet the size and format criteria. If the problem persists, try uploading two identical pictures as it has worked for some users in similar situations - learn more.

5. Restart Your Device
Restarting your iPhone can sometimes help refresh the app’s performance and connectivity, resolving temporary glitches.

6. Attempt Submission on Another Network
If possible, switch to a different Wi-Fi network or use mobile data. Poor connectivity can hinder submissions, so trying a different internet source may help.

7. Contact Support
If you've tried all the above steps and still cannot submit your information, reach out to the ArriveCAN support team. You can find contact details on the ArriveCAN website. If needed, call 1-833-283-7403 (toll-free from Canada or the U.S) - learn more.

These steps should help you resolve issues with the ArriveCAN app. If the problem continues, consider checking online forums like Reddit for possible current isuues with the app or updates from users facing similar situations.