I have been using this phone for about 18months. It is working pretty well. But the quality is not at all good. Nokia was well known for its quality but Microsoft is unable to keep upto the quality standards. The charger and headphone has stopped working. The charging dock of the phone broke after one year and it costed me Rs2100 to repair it from the Authorised Microsoft Retail Service Store. After 18months of use, I would say the RAM fails. While playing games/using app, I suddenly closes automatically. The touch fails to work with the slighest of moisture on the screen or on the finger. Overall, I am not happy with it. Do not go for Microsoft.