I don’t know that is it only me or is it a generic problem, but I found the battery is getting stuck once I place the battery in its slot. I also took it to lenovo service center who suggested me to exchange the piece as it might be defective. So that is what I did, but to my misery, the new piece also has the same problem . Then few of my friends came by and the ones with a bit of nail and those who were powerful(the gym guys) could open it that too after few minutes of struggle. I took the phone for my sister thus I am that there is no chance that she could open it. I called the customer care they said the delivery is not updated in their system and ask me to call later. I am planning to return the product. I don’t know if it is the problem with the specific handsets or the model itself.