Originally Posted by Djin<br />
Thanks!<br />
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I've downloaded the ROM, and will be flashing later today. The phone was preloaded with GB and I upgraded via Kies expecting JB, but instead I am sitting with ICS 4.0.4. The guide you posted sugest that in order to do a clean install, you would have to load GB again, then wipe cache etc. and then install the JB rom. <br />
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Has anyone just upgraded from ICS to JB ? Obviously I will not be wiping cache due to the bricking issue !<br />
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I suppose the other option is to root with a safe kernel like mentioned above, then wipe and then upgrade with the rom ?
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That guides actually old and intended for upgrading to ICS, but if you try and switch from custom to official your likely to break your phone, hence the "go back to GB first"<br />
Personally I went from GB to ICS to JB to JB official. I just use it as a reference so that I setup Odin properly, generally forget which block to tick int he months between upgrade.<br />
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You can safely go direct from ICS to JB, just ignore everything that's not about the actual upgrade part, think its 1b. I would root if I were u as the new JB rom comes with a whole lot of extra Samsung and Google **** that we cant even use in this country and only way to remove em is with rooting.