Q: How do I change the phone number associated to my keychain?

Many thanks, this is the solution which working!

Thanks!

Yep that worked, thanks, worked on this for days

It works for me! Thanks!

Thanks!! This was the only solution that worked for me.

The solution that I just used was to go to appleid.apple.com, sign In, and change my listed phone number. This immediately changed the number on my iCloud keychain.

Ahhmt is the man!!!!! Thank you!!!!

I have been wracking  my brain for weeks trying to figure this out! I got a new number and was going crazy trying to troubleshoot this! thank you!!!

I thought I had read on another forum that resetting your phone number in your AppleID didn't work - so I didn't try that, but QuantumSpark above tried and said it worked - that would be the easiest way.

I used dusanp83's solution and it worked for me!

thank you dusanp83!

it worked for me, thanks

When 2 Step verification is activated, you have to log in with a Browser to Manage your ID on iCloud.

Assuming you can not access your phone (iOS). That worked for me

Log in with a Compatible Browser on to iCloud. Go to iCloud Settings by clicking on the Settings Button.

Choose Manage your ID. You'll be prompted to sign in again. Then you are asked for verification on a device??

Click on Unable to receive messages on any of your devices?

Now you will need the Recovery Key.

Hopefully you stored it (saved) somehow as told when setting up 2 Way Verification.

After this you can manage your devices. Type a new Phone Number. You will get a code (Verification 4 Digit on your new Device)

Then just delete your old Number. That's it...

Open iCloud on your Mac through System Preferences. Scroll down to the listed services on the right. On keychain row, selection Options. You'll have your number listed there. Change it to whatever you want.

Have fun !

The phone number listed is wrong, but there is no option to update the phone number.
And I already changed the phone on icloud account

That`s the real solution! Thanks Ahhmt!

Thank you Thank you Thank you.  I have been agonizing over this for a while.