Since ACIP 5.1.1 seems to be Stable for me and I tried all the roms for the Zmax that are out there since May. Is the Service Cut just a Rom issue for some or do the Zmax Z970 internals manufacture parts vary or do they have all the same internal manufacture parts. I liked 6.0 Roms but I did notice sometimes the service seems to cut a lot when I was on wifi and I was out of range of the wifi that is when I lost service and had to reboot. I looked at the Zmax Pro and like it. To bad I'm on Straight Talk. I'll have to wait. Question on the Pro I read it only has 2.4 ghz only for wifi? Thanks