I Ordered this phone for my sister by seeing specs offered on paper by celkon. but iam not very impressed or satisfied with the performance and the camera of this phone.
the display is 4.5 IPS lcd display 540 x 960 pixels(~245 ppi pixel density) which is not so great and not even a gorilla glass protection which is offered by many mobile sellers these days. there is problem with the UI, it runs on kitkat 4.4 from the time of unboxing and no update untill now, it literally glitches every time even opening the facebook application which is given pre-installed in the Q455.
Even the built design is not so great and varies from the image I saw in the e-commerce website. it supports both 2g and 3g networks which is not bad but it is limited to only few bands like 2g-GSM 900 / 1800, 3g - HSDPA 2100, which is very difficult to cover all the networks providers data packs.
coming to the battery life: it is powered by a 2000mah battery but gives only about 2 hours screen on time only which is very difficult to use for normal user without a powerbank.
The only pro is that it has a 16gb internal storage and can expandable to 64GB.
conclusion: this product is suggested to buy only on deals when its price around 3000-4000 bucks