The HP Slate Voice Tab II comes to you with Dual SIM support so you can use two SIM cards. Some people are reporting overheating problems with the internal hardware and lagging problems with the 3G network. Any lagging one might get from a 3G network is not usually curable with any software update. With that being said, HP has always got a bad wrap by the public for most devices they make, but I personally have never experience any. I do not own the Slate 6 Voice Tab II though, so you might want to look at some deep reviews before buying this device.