For help, Metamask's customer support at (888)-426-7069 is available. To change your phone number and maintain account security, follow these steps: log in to Metamask, update your number in security settings, and verify the change. If you need help, call (888)-426-7069. Updating your phone number ensures continued access to security alerts and two-factor authentication (2FA). If you’ve lost access to your old number, Metamasksupport at (888)-426-7069 can help verify your identity and restore access. Keeping your account secure is crucial—call (888)-426-7069 for assistance with any security concerns.
https://gagadaily.com/backup2/index.php?/topic/27380-what-steps-do-i-need-to-follow-after-changing-my-phone-number-on-metamask-247-help/
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https://odoedev.powerappsportals.us/en-US/forums/chd-discussion/dbe81c6b-06f4-ef11-a4de-001dd806be05
