1) It has 512 MB of RAM which may be a critical issue if you ever expect this phone to enjoy multiple applications at once running smoothly or to enjoy games.
2) Its processor is 1.2 Ghz which is also responsible for slow processing in case we install a big application or we use many applications on same time.
3) It has 4 GB internal memory. However thats not what you may expect. You will only be able to use about 1.8 GB of memory as other memory is reserved for operating system and other system files.
4) It has 3.15 Mega pixel camera which gives good pictures in good lights and in darker its quality is not good.
5) It comes with Android KItkat and theres no way to upgrade it anyhow.
6) It has 1500 mAH battery so I suggest you to bring charger with your phone wherever you go if you have a habit to use mobile often.