I have been using this device as my primary mobile using 2 sims(1 with 3G data and another for calls) along with 32GB of sd card. Battery Life:
As long as for first 4 days battery was surprisingly super.I got it for 1 full day even after 3g was on, music was played for more than 3hrs. Ram1GB its quite impressive in handling multiple apps same time. Screen: Very bad quality, sluggish and sometimes non responsive.
Good product for those who need a phone for normal daily smartphone usage like checking mails, whatsapp, browsing and other small apps. Not good for games and all. Overall good buy at this price.