I don't know whether you are considering anyother model except this or not. Among the three samsung is a trusted name and Its worth getting on all factors like A/S, cost availability and other unmentioned factors as well.
As per me, Nokia mobile market has been observing a fall since last year and It't not worth to go for one..Looks for other brands which may satisfy your needs.
I recently got samsung galaxy Y and Its a good phone...The features in it are quite good and I do hope you will enjoy it and it falls under your budget as well.
Yes LM6400 model of LG is 3D along with smart functions i.e. internet connectivity. For more details you can visit Experience the Smartest 3D TV LG 32LM6400 Cinema 3D Smart TV, LED LCD TV - Full HD 1080p Cinema 3D Smart TV - LG Electronics IN