I am using HTC desire 830 dual sim version. It have three slots and not a two slots.This budget phone, for me it is almost perfect .Everything that we only can get only in an expensive phone, but you can get in a budget phone. Good performance , good speaker, good screen , good camera , can customize themes and fonts and I can said everything just like your old Nokia phone .And I also want to tell you one thing the update of marshmallow will lag and give problem to your phone.Sometime , not every update is needed. The lolipop in desire 830 is quite good.It’s fast and no lagging at all.