I am use Oppo F1S 3GB ram version. The look of the mobile is awosome its like apple phones. Very stylish very slim or glosy. But ther oppo f1s mobile is have some bad problames like Hang, Slow or the back bottom kick is very slow but the camera of the mobile is very good I like the camers the oppo f1s camera is better than all of mobile phones. The highlights of the oppo f1s mobile is the cameras its 13MP Rear camera or 16MP Front camera. The selfie camera is better than rear camera. The phone have 5.5 inch HD display the bettery of the mobile is 3075 mah bettery. The F1S is running MT6750 64-bit processor. The phone have Dual sim, 4G supported LTE, the processor core is Octa core, android lollipop 5.1, processor clock speed is 1.4 GHZ, almost the phone is good stylish look but the price is so high almost 19000. Any way I like this phone to much if you guys both the phone than both the new version 4gb ram 6gb internal memory.