Samsung Galaxy Trend Lite Duos S7392 data:
Other names :Galaxy Trend Duos, Galaxy Fresh Duos, Galaxy Trend Lite Duos
GSM frequencies :850 900 1800 1900
Standard UMTS :900 2100
Type :TouchDimensions (W x H x D) :121,50 x 63,10 x 10,85 mm
Main display :Color / TFT
16M colors
480 x 800 px (4.00") 233 ppi
Talk time (max.) :3G: 480 min. (8,0 h)
Stand-by (max.) :3G: 350 h. (14,6 days)
Standard battery :Li-Ion 1500 mAh
Internal memory :4 GB
Memory cards : microSD, microSDHC, microSDX (up to 64 GB)
Operating system :Android 4.1.2 Jelly Bean
Processor clock :1,00 GHz
Touchscreen : yes
SAR (10g) :0,428 W/kg
DualSIM : yes
How to hard reset:
Warning! All data will be lost after hard reset.
1.Power off your phone
2.Press together volume up + home button + power button until you will se Samsung logo on the screen
3.Select with volume buttons "wipe data/factory reset" and press power button to confirm
4.Select "yes" and press power button to confirm
5.Wait until format is complete
7.Press power to confirm "reboot"
8.Wait until the phone restarts
That's it!
Here is video how to do: