forgot the password, can't get into recovery or download mode

hi guys, a friend of mine have the xperia z1 and he forgot the password, i'm a galaxy kind of guy so i don't know much about the xperia z1
i looked up how to get into recovery and i tried everything but still can't get there, and i don't know how to use the flash tool

I tried :
- power button + vol up simultaneously and after the phone is on
- "repair phone" by using Xperia Companion
- update by using Xperia Companion

i even took it to various shops but they all have no idea how to fix it
really desperate to some help, thank u in advance