- Dual SIM phones. Most people have multiple SIM, mostly prepaid and recharge them based on the cheapest offer. Incoming calls are free. So if a provider has better offer on outgoing calls, that sim is used that month for making calls and next month they use the other number.
- SD card support. Best selling phones support this. People carry lots of movies and music with them, mostly pirated and takes lot of space. And you can normally buy SD cards pre-filled with popular songs and movies that you just insert into your phone when traveling.
- 3.5 inch headphone jack. Yes, people need this. Bluetooth sets are costly.. $30 for bt headphone, compare that to a $100 xiaomi phone.
- And of course, side loading of apps. Android allows this, iphone no. So you get apps from some one and just use it, without going to play store.