The oppo a71 model is a superb phone launched its cost is around 12990 in indian currency.i used this phone nearly 1month it is my personal experence about the phone has dual sim option and dual 4g+ 4g nano sims the screen size of the phone is 5.2 inches and operating system android OS v7.1( Nougat) the phone comes with 3gb of ram and 16 gb internal storage and micro sd card is Expendables upto 256gb , the phone has 13 mp rare camera with auto flash face deactivate and 5mp front facing camera it gives you beautiful selfies to take and you can take continue shots and the main the phone is 4g phone the battery backup of the phone is also very good it comes with 3000 mah non-removable battery the phone has good features like fingerprint sensor, compass etc, .