BTW, every one says this - but nobody uses it like a daily driver. Yes, it will work as a spare - with just one app - like whatsapp - but for many poor - they need
1. Uber or Ola
2. Facebook or WhatsApp
3. linkedin to whatever local app
4. youtube
Why dont you try to use it for a week with all your existing apps?
If it works as good - why would anyone buy newer?