how to reset or format iphone without apple id ( because forget password )

Hey there tashi_123,

We understand you're looking for steps on how to restore your iPhone due to a forgotten Apple ID password, and we'd be happy to help.

Since restoring the device would remove all the data from your iPhone, you may be able to recover the password first to prevent the loss of data using the steps listed in the following resource: If you forgot your Apple ID password

If you restore your iPhone to factory settings without your Apple ID password, you may run into Activation Lock. If you have "Find My" enabled and restore your iPhone, you will be prompted to enter your Apple ID and password once your iPhone is erased. You can read more about activation lock here: Activation Lock for iPhone, iPad, and iPod touch

If you'd still like to restore the iPhone to factory settings, check out the following article for help: Restore your iPhone, iPad, or iPod to factory settings

Take care!