Ok that's a huge problem . I have to rethink then.If u can live without possibly having access to your SD card yes.i have it on my 640 and it's not recognizing my SD card at all.
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My biggest issue right now not recognizing my SD card even after a hard reset. It initially worked then I installed two apps and when I soft reset it stopped reading it completely
Besides that everything else is working minus a few hiccups here and there
Build 10166 is working very smoothly on my 640-XL.. Battery performance is almost same as in 8.1.. Overall its a good build even though its still in preview version but it can be used on daily driver![]()
Is dual sim feature working ?
I actually dont have 2 SIMs so I cant say for sure..