Do not remember pattern passcode for locked screen of galaxy Samsung s j. How can I reset or bypass locked screen to reset

You may have to do a hard reset after you have turned it off... then (hold power then press and release the volume up button) You will be in safe mode of the phone... then press vol down to bring up menu and chose wipedata/factory reset
!WARNING! This WILL REMOVE ALL DATA including photos contacts videos and any documents Perhaps backup to computer (a lot on you tube about this :)) Hope you go ok...

Here i provide how to unlock galaxy with hard reset. this will erase all your data from galaxy mobile.
1. Press volume up , home and power button.
2 This will provide you 6 option including hard reset wipe data. this is fourth option.
use volume down button to select wipe data factory reset and confirm it by power button.
3. this will hard reset your galaxy mobile this can unlock only screen lock.
4. when hard reset completed select reboot system now.
5. After system rebooted it will not ask for screen lock password.
if you want to sim unlock your galaxy mobile here is the guide.
Howto network unlock samsung galaxy s7 edge