..::Request to open the phone without deleting the information::..
 

There is a way to open the phone, but do not erase it

i think you r talking about user passwords
that can be done through custom recoveries
but that needs unlocked bootloader only few models support unlocking bootloader without data loss only via xtc2clip

Which model and why?

From year 2015 to 2018
The customer wants his information
I got the bootloader with the box
But the information was cleared

custom recovery can be installed with s-off only without bootloader unlock in some models

Hello,

Depends on the model, usually user password is a part of the encryption, so only bruteforcing can help.