The phone number that I used to login to my

Have you tried using this site:
https://www.facebook.com/help/136465059824353

You will need to sign in using a saved device that you have previously used in the past. Then you will be able to turn off the Login Approval settings or update your phone number.

According to Facebook:
https://www.facebook.com/notes/facebook-engineering/introducing-login-approvals/10150172618258920

"If you ever lose or forget your phone and have login approvals turned on, you will still have the option to authorize your login provided you are accessing your account from a saved device. Having these recognized machines associated with your account prevents lockout and ensures that you can regain access to your profile."

Hope that helps!

Facebook Customer Support:
Phone Number: 1-650-543-4800
Average Wait: 12 minutes - 24 hours, 7 days

How to Videos Below:

Facebook Customer Support:
Phone Number: 1-650-543-4800
Average Wait: 12 minutes - 24 hours, 7 days
How To Recover Your Facebook Account When You Can No Longer Log In

Forgot Password Can Log In Facebook

https://www.facebook.com/help/215543298568604

YOU CAN CONTACT FACEBOOK AT:

• Phone Number
  

  650-543-4800

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  Directs you to online support. Facebook does not offer phone support.

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  Average Wait: 11 mins - 24 hours, 7 days

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To safeguard user privacy, the Facebook login process requires the input of an email address, username or mobile number as well as a password.
While you may opt for the "Remember Me" and "Remember My Password" features on your personal device, there may be times when you need to manually log in to your account.
If you're not able to locate your account from the login page, there are several steps you can take to recover it.Invalid or Expired Email Address
1. If you no longer have access to the email address that is linked to your Facebook account because it is invalid or expired, locate your account by logging in with an alternative.
If you registered a username, enter it in the "Email" field on the login page.
Enter your password and select the "Login" button. If unsuccessful, type your mobile phone number in the "Email" field on the login page.
Enter your password and select the "Login" button.
This will work if you've registered for Facebook texts.
If unsuccessful, type an alternate email address in the "Email" field on the login page.
Enter your password and select the "Login" button.
If you are still unable to identify your account, complete and submit the "I Cannot Identify My Account" report, which you'll find at facebook.com/help.
Click "Browse Help Center Topics" in the left column. Click the "Login & Password" option under "Managing Your Account."
Click on "I Can't Remember Which Email Address I Use To Log In To Facebook" and click the link in option 5.
Click the "I Can't Identify My Account" link in the lower-left corner of the resulting page to access the report.
2 . After you've logged in, click the "Account Settings" option that appears in the "Account" drop-down menu in the upper-right corner of any page.
3. Click the "Change" link next to the "Email" option of the "Settings" tab.
View your current email settings and edit as desired to manage email addresses that can be used for login.
Invalid Password
4. Visit facebook.com/recover.php in your browser.
5. Enter your email address or mobile phone number in the "Email or Phone" field that appears at the top of the page or enter your Facebook username in the space provided.
If you don't know the email address, mobile phone number or username that is associated with your account, type your name and the name of a friend in the spaces provided at the bottom of the page and click "Search."
6. Type the words that appear in the resulting security box to authenticate your request and click "Submit."
7. If the information that appears on the resulting page matches your account, click the "Reset Password" option to access your account.

To safeguard user privacy, the Facebook login process requires the input of an email address, username or mobile number as well as a password.
While you may opt for the "Remember Me" and "Remember My Password" features on your personal device, there may be times when you need to manually log in to your account.
If you're not able to locate your account from the login page, there are several steps you can take to recover it.Invalid or Expired Email Address
1. If you no longer have access to the email address that is linked to your Facebook account because it is invalid or expired, locate your account by logging in with an alternative.
If you registered a username, enter it in the "Email" field on the login page.
Enter your password and select the "Login" button. If unsuccessful, type your mobile phone number in the "Email" field on the login page.
Enter your password and select the "Login" button.
This will work if you've registered for Facebook texts.
If unsuccessful, type an alternate email address in the "Email" field on the login page.
Enter your password and select the "Login" button.
If you are still unable to identify your account, complete and submit the "I Cannot Identify My Account" report, which you'll find at facebook.com/help.
Click "Browse Help Center Topics" in the left column. Click the "Login & Password" option under "Managing Your Account."
Click on "I Can't Remember Which Email Address I Use To Log In To Facebook" and click the link in option 5.
Click the "I Can't Identify My Account" link in the lower-left corner of the resulting page to access the report.
2 . After you've logged in, click the "Account Settings" option that appears in the "Account" drop-down menu in the upper-right corner of any page.
3. Click the "Change" link next to the "Email" option of the "Settings" tab.
View your current email settings and edit as desired to manage email addresses that can be used for login.
Invalid Password
4. Visit facebook.com/recover.php in your browser.
5. Enter your email address or mobile phone number in the "Email or Phone" field that appears at the top of the page or enter your Facebook username in the space provided.
If you don't know the email address, mobile phone number or username that is associated with your account, type your name and the name of a friend in the spaces provided at the bottom of the page and click "Search."
6. Type the words that appear in the resulting security box to authenticate your request and click "Submit."
7. If the information that appears on the resulting page matches your account, click the "Reset Password" option to access your account.
https://www.facebook.com/recover.php
Identify your Account
http://www.facebook.com/help/?faq=18012
How can I make sure I don't lose access to my account

To safeguard user privacy, the Facebook login process requires the input of an email address, username or mobile number as well as a password.
While you may opt for the "Remember Me" and "Remember My Password" features on your personal device, there may be times when you need to manually log in to your account.
If you're not able to locate your account from the login page, there are several steps you can take to recover it.Invalid or Expired Email Address
1. If you no longer have access to the email address that is linked to your Facebook account because it is invalid or expired, locate your account by logging in with an alternative.
If you registered a username, enter it in the "Email" field on the login page.
Enter your password and select the "Login" button. If unsuccessful, type your mobile phone number in the "Email" field on the login page.
Enter your password and select the "Login" button.
This will work if you've registered for Facebook texts.
If unsuccessful, type an alternate email address in the "Email" field on the login page.
Enter your password and select the "Login" button.
If you are still unable to identify your account, complete and submit the "I Cannot Identify My Account" report, which you'll find at facebook.com/help.
Click "Browse Help Center Topics" in the left column. Click the "Login & Password" option under "Managing Your Account."
Click on "I Can't Remember Which Email Address I Use To Log In To Facebook" and click the link in option 5.
Click the "I Can't Identify My Account" link in the lower-left corner of the resulting page to access the report.
2 . After you've logged in, click the "Account Settings" option that appears in the "Account" drop-down menu in the upper-right corner of any page.
3. Click the "Change" link next to the "Email" option of the "Settings" tab.
View your current email settings and edit as desired to manage email addresses that can be used for login.
Invalid Password
4. Visit facebook.com/recover.php in your browser.
5. Enter your email address or mobile phone number in the "Email or Phone" field that appears at the top of the page or enter your Facebook username in the space provided.
If you don't know the email address, mobile phone number or username that is associated with your account, type your name and the name of a friend in the spaces provided at the bottom of the page and click "Search."
6. Type the words that appear in the resulting security box to authenticate your request and click "Submit."
7. If the information that appears on the resulting page matches your account, click the "Reset Password" option to access your account.

To safeguard user privacy, the Facebook login process requires the input of an email address, username or mobile number as well as a password.
While you may opt for the "Remember Me" and "Remember My Password" features on your personal device, there may be times when you need to manually log in to your account.
If you're not able to locate your account from the login page, there are several steps you can take to recover it.Invalid or Expired Email Address
1. If you no longer have access to the email address that is linked to your Facebook account because it is invalid or expired, locate your account by logging in with an alternative.
If you registered a username, enter it in the "Email" field on the login page.
Enter your password and select the "Login" button. If unsuccessful, type your mobile phone number in the "Email" field on the login page.
Enter your password and select the "Login" button.
This will work if you've registered for Facebook texts.
If unsuccessful, type an alternate email address in the "Email" field on the login page.
Enter your password and select the "Login" button.
If you are still unable to identify your account, complete and submit the "I Cannot Identify My Account" report, which you'll find at facebook.com/help.
Click "Browse Help Center Topics" in the left column. Click the "Login & Password" option under "Managing Your Account."
Click on "I Can't Remember Which Email Address I Use To Log In To Facebook" and click the link in option 5.
Click the "I Can't Identify My Account" link in the lower-left corner of the resulting page to access the report.
2 . After you've logged in, click the "Account Settings" option that appears in the "Account" drop-down menu in the upper-right corner of any page.
3. Click the "Change" link next to the "Email" option of the "Settings" tab.
View your current email settings and edit as desired to manage email addresses that can be used for login.
Invalid Password
4. Visit facebook.com/recover.php in your browser.
5. Enter your email address or mobile phone number in the "Email or Phone" field that appears at the top of the page or enter your Facebook username in the space provided.
If you don't know the email address, mobile phone number or username that is associated with your account, type your name and the name of a friend in the spaces provided at the bottom of the page and click "Search."
6. Type the words that appear in the resulting security box to authenticate your request and click "Submit."
7. If the information that appears on the resulting page matches your account, click the "Reset Password" option to access your account.
https://www.facebook.com/recover.php
Identify your Account
http://www.facebook.com/help/?faq=18012
How can I make sure I don't lose access to my account

Your login will either be the e-mail address you signed up with or your phone number.

• Once you have entered an email address you can use the Forgot Your Password? link under the login.
• If you cannot remember your email or it no longer exists you have two options: 1. Have a friend (who has Facebook) look at your Timeline and tell you which e-mail account you have listed. 2. Go to the Password Rest Page and try searching for your account using your name and a friend's name.

I hope this helps!