Do i have to use the HS820 Headset By Motorola that is sold in the verizon store or can i go out and buy the HS810 or HS850 and still have it work with my V710? The reason i also ask is that the headset through verizon is very expensive and i could get it through a store around my way at the mall or something for cheaper if i know it works...Also is there any software updates that enables full capability to your phone?