Disadvantages Of Mobile Phones

I am doing M.Sc degree in IT and got an assignment to make project on the topic Disadvantages Of Mobile Phones. Will you please tell me lists of disadvantages of using mobile phones and provide me lists of some top worldwide vendors of mobile phones?

[Shaleen]

Each and every technology has its own advantages and disadvantages for students and mobile phone is one of them.

Some disadvantages of mobile phones:

Playing games every time
Change their way to some unwanted things
Sleepless nights and get tired
Disturbed other students
Reduced to spend time with family
Never-Ending Interruptions
Distracted Drivers
Negative Impact on Personal Contact
Health Effects
Increased Stress Level
The Effect on the Environment

Top worldwide vendors of mobile phones:

1 Samsung
2 Nokia
3 Apple Inc.
4 LG
5 ZTE
5 Huawei