What happens if I lost my phone and that is how I access my accounts??

[jademaxsuy]

When using google 2fa make sure you also handwritten the code, if you use authy you can use it on multi device without losing the security codes that you added. About the sms verification, better to disable it so you can still access your  account even if you lost your  phone and if there's a 2fa then start enabling 2fa by using authy or google 2fa.

[Onuohakk]

You can start now by making use of email verification rather than SMS phone verification.
But some SIM card provides you with the option of welcome back that is getting a new SIM but still maintain the number of your lost sim