I tried searching various phones under 10k. my priorities were:
low SAR ( raditional level) , min 16 gb internal memory , 5.5" IPS display , gorilla glass , android lolipop, a fast and reliable processor.
I couldn't find even a single by any reputed manufacturer to offer all above mentioned features. lenovo models are good but beaware, their SAR( radiation) levels are high and with on the prescribed upper limits. so they did not fit for their scheme.
No lags at all. CAMERA issue: I was bit skeptical about its camera output after reading divergent and critical remarks, but let me assure you, the camera works well. and its budget gadget. highly recommended.
