Do you want to know whether your smartphone is fake or original?
You know, it is amazing to discover that many people carry mobile phones around without knowing whether or not they are original or fake.
Fake phones have a lot of disadvantages.
They:
1. most of their features do not function optimally
2. poor battery life( can just become hot and drain easily)
3.touch function on the screen misbehaves from time to time
4.fake phones are not secure can easily be hacked, infected with malwares, virus etc
5. make you waste money on repais.
etc.

But there are several ways to detect if your fone is original and one of the most popular ways is to check your IMEI number using *#06#
Some phones will fail to display IMEI after activating that code , then such phones are not orginal. Also when your phone IMEI number does not start with 35, it is most likely your phone is fake.

See a lot more others here http://www.talkinfotech.com/phone/how-to-tell-if-your-smartphone-is-fake-or-original/