Just got my Sensation on Monday and since Monday night, the Mobile Network in the notifications bar constantly cycles between "Turning on..." and "On". It only stays on for a second before going back to turning on. I've called t-mo, they say its a software issue. They had me try all the tricks including the cyphering and radio on/off method. I know there have been issues with with data and this phone, but I have no connectivity whatsoever and I've tried it at many different locations, all high 4g areas. If I switch to GSM mode it still cycles the same way, only in and out of 2G. Is this the same issue others are having? Any help, info or advice is appreciated.