Hi, I purchased the iRulu 7" tablet with Android 4.1. Example tablet is here: Irulu 7" Android 4 1 Jelly Bean Tablet PC RK3066 1 6GHz 8GB HDMI Bonus Red Case | eBay The specs indicate a sim card slot for 3g use. Does anyone know if that means this tablet can be used as a phone if I use an activated sim? I want to use it as a primary phone. Ready to root/throw into a pot of melted silver if necessary Thanks..