Some Asus Transformer Prime tablets get a brain freeze, won't update to Ice Cream Sandwich
The over-the-air Ice Cream Sandwich update for the Asus Transformer Prime has been live for about a week now, but it has not been going smoothly for everyone. According to several reports, a Serial Number Unknown error is preventing the tablet from getting updated leaving a bunch of users stuck with Android 3.2.
Although Asus has yet to come up with an official statement on the matter, let alone provide a fix, there is a thread over at the XDA-Developers forum where users are sharing their experiences. Furthermore, a company representative, which happens to be a member of the forum too, has suggested trying the following:
As for the Serial Number Unknown problem, please try doing a factory reset. If it does not work the first time, after the reboot, please try it again and once at the desktop, wait about 10~15 minutes for the system to sync with the server. So far this has worked for users I am directly assisting at the moment on another forum but it has not worked on two particular units that were returned yesterday.
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