yea, listed below are some of their values to life.
You can carry a mobile phone with you so you don't miss important calls
If you are lost, you can call for directions.
If you are in an accident, you can call the police or ambulance - and if the phone has a camera, you can take pictures of the accident.
You can listen to music, text, play games when you're bored.
Most mobile phones have a calculator and a phone book.
You can use a mobile phone to call your customers or boss if you are running late to a meeting.
You can surf Internet & Connect with the whole world by Mobile.
You can chat & video conference.
Keep in touch with friends and family
Good for emergencies
Employees can keep in touch at all times.
Customers can contact staff 24/7
Phones have internet connection
More work available
They have cameras
You can check your emails
Can be used worldwide
It can fit in your pocket.
you can connect even from other country to another by using roming serive

question is, how long can you stay without you mobile phone?

20 minutes

I hour max!
Else something might happen

Just can't stay without my phone unless the network is bad but once the network is ok, my phone becomes the second me....everybody around me knows that, not proud of it though because I think is an issue.....lol

This topic has been thrashed numerous times.....I can't even keep count.
Endeavour to use the search button before starting any thread.

https://www.nairaland.com/890493/how-long-go-without-phone