Xolo Era 1x is the best 4g budget smartphone ever. This phone is running on the Android Marshmallow 6.0 which is quite awesome. The main thing which make this phone the best budget 4g phone is that the camera of this phone very good quality.
this phone produced good quality pics from rear camera which is 8mp with moonlight led flash And front camera is 5mp with the dual front led flash.
battery of this phone is 2500 mah but I received 2250 mah battery in box.
the phone is fast running and less hanging problems with 1gb ram and 8gb internal storage about 4gb useable and expendable upto 32 gb with sd card.
Design is also a good quality of this phone. power and volume buttons are good and stylish.
Thastall.
I think that this phone is the best budget 4g volte phone in that price range.