I think it is just software conflicts somewhere, a bad tweak, cab, reg edit....what phone symbol you are referring to, the one you posted I have seen before, the odd one at times appear when first booting and ppc still trying to know what the phuk is going on with it
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no signal, no data....think it is just one step before t finds life.
I will definitely take that thing back if it misbehaves like before, could be a bad flash...i dunno really.Good luck and thxx for keeping us posted