How to reset my locked s duos?

my samsung DUOS GT-7562 is not working by the methods you gave me above. what shall i do please help me. 

... Switch ON your Samsung Galaxy S duos with a NOT ACCEPTED SIM Card ...  

thanks.. network data mode worked for me.... 

i press the volume up+down+home+power button but did not open the restart option 

Thanks a lot. Data network option worked for me and not lost any data. Thanks ... 

Too many pattern attempt in Samsung Galaxy S Duos GT-S7562, Forgot gmail Password,i tried above steps but sill showing same screen after the restart. what can i do please help me...... 

thank u very much.. through data network mode procedure is worked out for me... 

... then select Wipe data/Factory Reset enter ok..then select reboot ...  

thank u very much dear when data network enabled by using power on button my phone unlocked b 

... out without wiping data/factory reset. If your sim card has ... where you can select your lock password/pattern. Hope this helps ...  

... -reset your phone because there isn't another way to remove the lock ... list select Wipe data/Factory Reset and the phone will reboot ...