Enatega Customer Application: Phone number already associated error shown during login with email

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Describe the bug
When a user logs in using their email address and proceeds to verify their phone number, the app displays an error message stating that the phone number is already associated with another account — even though it's the correct number linked to the same user.

🔄 Steps to Reproduce:

Open the app and choose to log in with email.
Enter a valid email and complete login.
When prompted, enter your phone number for verification.
Observe the error message.
Expected behavior
The phone number should be verified successfully if it belongs to the same user account.

Start by reproducing the email login and phone verification flow in the React Native app, then trace the handlers involved in checking whether the phone number belongs to the authenticated user. Done means a correctly linked number is accepted during verification without the already-associated error.

Written by the indexing model from the issue text.