How to fix mobile data connection on 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 ... ://www.samsung.com/in/consumer/mobile-phone/mobile-phone/dual-sim-phone ...  

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... 

... mobile and press volume up + power on button, then select Wipe data ... /Factory Reset enter ok..then select reboot device, now your mobile ... will be restart, after this your mobile will be ...  

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

... sim card has access to Mobile data(2G or 3G enabled), ... following options. Power off Data network mode Flight mode Restart ... Select Data network mode and now try ...  

... the phone will automatically enable data connection and it will send a ... case it can't activate data connection to send the recovery PIN ... From that list select Wipe data/Factory Reset and the phone ...