Talking to letv 1s eco, I am using this phone from last six months and now finally I am going to review, I will cover all of the cons. Cons: 1) While litle heavy usage this phone heat up a lot which is not ignorable at all.2) during multitasking and heavy usage battery last long only 6-8 hour which is also a bad thing in this phone.3) eui looks good but many time it stops working and shows unfortunatly stops which is also a bad thing of this phone while during importnat tasks.4) it not supports volte which is also bad thing.5) camera quality is not that good because while focusing on nearly object it dissapoint, during night when ever I capture any nearly object with flash light the picture got all white which also dissapoint and also no feature of increasing brightness while capturing pictures and also got blur always during fast capturing.