Do not buy Karbonn ST 7 Tab..this does not support any USB dongle except TATA and Relience ..for which company has TIE UP with tata and reliacne. no where is mentioned this.this you will realize after the purchase. also it claims full HD1080p support. but there is no HDMI port. and resolution of screen is 800 X 480 Then how can you play HD Video. overall its not the worth for money paid.and general error . when you run any software ..( android loader Has stopped system will shut.)