Samsung Galaxy S3 mini I8190 specifications:
GSM frequencies :850 900 1800 1900
Standard UMTS :900 1900 2100
Standard CDMA : -
UMA : -
Type :Touch
Dimensions (W x H x D) :121,55 x 63,00 x 9,90 mm
Weight :120,00 g
Main display :Color / Super AMOLED
16M colors
480 x 800 px (4.00")
Talk time (max.) :2G: 850 min. (14,2 h)
3G: 470 min. (7,8 h)
Stand-by (max.) :2G: 460 h. (19,2 days)
3G: 360 h. (15,0 days)
Standard battery :Li-Ion 1500 mAh
Internal memory :8 GB
RAM memory :1 GB
Memory cards : microSD, microSDHC (up to 32 GB)
Operating system :Android 4.1 Jelly Bean
Processor :ST-Ericsson U8420
Processor clock :1,00 GHz
Touchscreen : yes
DualSIM : no
How to hard reset:
If you forgot your screen lock combination or password follow these steps.
Warning! All data will be lost!
1.Press together volume up + home button + power button
2.Release your fingers of the phone when Samsung logo appear
3.Choose with volume buutons "wipe data/factory reset" and select it with power button
4.Choose "yes" with volume buttons and select it with power button
5.Wait untiil format is complete
6.Select "reboot"
Here is video how to do: