---
title: My app is telling me “Phone number is already in use”
description: If you are seeing this message, the phone number you are trying to enter has been previously connected to an Alto account. Please contact our customer support team to resolve this issue and proceed wi
---

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3. [Common App Errors](https://help.ridealto.com/app-troubleshooting?hsLang=en#common-app-errors)

# My app is telling me “Phone number is already in use”

If you are seeing this message, the phone number you are trying to enter has been previously connected to an Alto account. Please contact our customer support team to resolve this issue and proceed with account creation.

 

- [Membership & Account Options](https://help.ridealto.com/membership-account-options?hsLang=en#main-content)
  
  
  
  
  
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    - [I left something behind.](https://help.ridealto.com/trip-issues-or-feedback?hsLang=en#i-left-something-behind)
    - [Share an issue or feedback regarding your ride.](https://help.ridealto.com/trip-issues-or-feedback?hsLang=en#share-an-issue-or-feedback-regarding-your-ride)
- [Booking rides with Alto](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#main-content)
  
  
  
  
  
    - [I need to book a ride on-demand.](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#i-need-to-book-a-ride-on-demand)
    - [I need to preschedule a ride for later.](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#i-need-to-preschedule-a-ride-for-later)
    - [How do I apply my promo code?](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#how-do-i-apply-my-promo-code)
    - [I'm having trouble signing up.](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#im-having-trouble-signing-up)
    - [My app won't let me book.](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#my-app-wont-let-me-book)
    - [Why should I become a Member?](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#why-should-i-become-a-member)
    - [Can I ride as a Guest?](https://help.ridealto.com/booking-rides-with-alto?hsLang=en#can-i-ride-as-a-guest)
- [App Troubleshooting](https://help.ridealto.com/app-troubleshooting?hsLang=en#main-content)
  
  
  
  
  
    - [Common App Errors](https://help.ridealto.com/app-troubleshooting?hsLang=en#common-app-errors)
- [Other](https://help.ridealto.com/other?hsLang=en#main-content)
  
  
  
  
  
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