Hi! I see you're having trouble logging into the Sandbox app and also can't reset your password. Let’s get this sorted out together.

First, can you confirm if the issue happens right after a Sandbox refresh or if this is a more general login problem? Also, are you seeing any specific error messages when trying to log in or reset your password?

Meanwhile, here are some initial steps we can try on your iPhone with iOS 18.7:

1. Clear any saved passwords and cached data for the Sandbox app. Since you’re using an app, try going to your iPhone’s Settings > Sandbox app (if listed), and clear any stored data or cache. If the app doesn’t have this option, try uninstalling and reinstalling it.

2. Double-check that you are using the correct username and password combination. Sandbox environments sometimes append things like “.sandboxname” to usernames, so make sure your username is entered exactly as expected.

3. When resetting your password, ensure any emails sent from Sandbox aren’t going to your spam or junk folder.

4. If you refreshed the Sandbox recently, note that sometimes the original password or session cookies become invalid. The person who refreshed it might need to update your email or reset the password on their end to re-enable your access.

If these don't resolve the issue, we may need to consider deeper fixes, like resetting your Sandbox account credentials from the main production environment or contacting support to unlock/reset your password manually.

Could you share what you have tried so far and if any specific error shows up? That will help me guide you further.

Also, I found a relevant Salesforce help link with some useful tips on resetting Sandbox passwords: 1 and some community advice here: 2.

Let me know how it goes or if you want me to walk you through any step!