What are the advantages or disadvantages of cell phones?

Advantages
To connect with our relatives and friends has been made easier by cell phones now a days.
We can share stuffs and information with people in a matter of seconds, if emergency situation arises.
We never feel lonely if our cell phone is with us as our loved ones are always in touch.
It is travel friendly which easily fits into our pocket and does almost everything which a laptop and desktop can do.
Cell phones are cheaper than PCs and almost everyone can afford them.
Disadvantages
It is addictive.
Less use of books and paper and people generally rely upon cell phones more than their books and documents for studies and work related matters.
If used during night time in darkness, its light gives an illusion of morning to our brain, preventing sleep to come and people are left tired and generally deal with sleepless nights.
Sometimes, even if the phone doesn't rings or vibrates, we feel as if it is actually ringing, which is a medical problem.
The rays affects birds.
People who carry their phones in pockets which are close to chest are more vulnerable to heart problems. 

Cell phones are undoubtedly necessary in a fast-paced world we live in today. Although they are extremely useful on so many levels, they also have their disadvantages. I will discuss both the advantages and disadvantages below.
Advantages
A cell phone enables us to connect with others anytime, anywhere. It has never been easier to connect with our friends and family. We can reach one another instantly, whenever we desire, and wherever we go as long as there is network coverage. For example, in case of an emergency, one can easily get help if one carries a cell phone. 
In addition, a cell phone has become like a little computer, consisting of many programs and applications that enable us to do whatever we want. We can browse websites, send emails, watch movies, listen to music, play games, book flights, check for weather updates, and more. A cell phone is a powerful device that enables us to perform many tasks and get the results or solutions we need.
Disadvantages 
By relying so much on our cell phone, we can sometimes become addicted to it. We constantly depend on it, and we find it difficult to manage without it. 
As far as the Internet is concerned, people can become obsessed with checking their social media profiles, which means they immerse themselves into the world of the Internet. This often leads people to interact with their friends less in person. It is easier to chat with them on some social media platform than go out and have a decent conversation with them.
Additionally, we store important information on our cell phones, and there is always a risk that someone may access our private data. Sometimes we fail to secure our phones and risk being exposed.
https://www.enkivillage.org/advantages-and-disadvantages-of-mobile-phones.html