This is a xiaome redmi note 3 mobile android phine which 5.1 lolipop version with ram 2gb with astorage avilable for 16 gb udgrade with a micro sd card of 32 gb. 5.5 displays with a fingerprint sensor locking or locking the phone feature but mi remote inbuilt app. But there is a little more problem is a battery is non - removable li-poli battery is inbuilt. I think that inbuilt battery is as not reliable like the other phones. And a special defaective feature I it was that the storage in other phones phone storage will be upgraded with 128 gb. So please work on it