1. Constantly Distracting
It can be difficult to relax in a social situation in the age of mobile phones. A call or text can come in at any time. Society generally expects you to have your phone switched on, charged up, and within reach at all times. Many callers or text senders can become frustrated or annoyed if they don't get an immediate response.
2. Socially Disruptive
Disruption can happen in multiple ways. For example: a phone goes off during a musical or theater performance, somebody spends a dinner party texting rather than engaging with the other guests, or a family event is disrupted by someone receiving an important call from work. Mobile phones can destroy the atmosphere at events and undermine social social meetups.

3. Battery Power Keeps Running Out
One of the weaknesses of mobile phones is that they are so reliant on battery power. You regularly have to check how much power is left, as well as find ways to recharge. Battery power is improving all the time, but rather than improving the problem, all that happens is that new models are made that are more power-hungry. On top of that, the overall life of a mobile phone battery is just two to three years.
4. The Workday Never Finishes
Mobile phones make it easier for bosses to contact employees outside of regular work hours. In the past, an employee was able to rest and enjoy some down time when not at work, but nowadays it's not uncommon for them to be contacted when commuting to and from work, as well as in the evenings, or on weekends.

5. Photos and Video Mean No Privacy
One consequence of the prevalence of photo and video technology found on mobile phones is that personal privacy has become harder to maintain. In almost any public situation there is the possibility of being photographed or filmed. Once that media has been captured, it can easily end up in the public domain via social media.
6. Constant Expense
Owning, using, and keeping an up-to-date mobile phone model is not cheap. The problem is that as the technology is constantly advancing, phone models become archaic relatively quickly, requiring you to upgrade. Then there is all the data and other services that you need to pay for.

7. Spam
Receiving unsolicited sales calls or texts is annoying and disruptive. Often they don't even involve real callers, but are computer generated. Money making scams are becoming increasingly more common and sophisticated, and often target the most vulnerable members of society.
8. Another Thing to Carry Around
Much has been made of the portability of mobile phones, but the truth is that they are just another thing that we have to carry around with us at all times, along with our keys and wallets. Unlike keys and wallets, however, mobile phones are generally much more prone to damage and breakage from impacts, direct heat, or exposure to water.

9. If You Lose Your Phone, You Lose Your Life
For sure, it's useful to have all your contact info, photos, videos, and other information on one device, but if you ever break or lose that device, you can find yourself with real problems. Even just running out of power can result in you being unable to access vital information and cause you real problems.
10. The Screen is too Small
In theory, phone's are great devices for watching videos or live streaming, but in practice the screen is too small to fully appreciate a movie, or sporting event. Even playing games and performing everyday tasks like texting can be fiddly and frustrating.

11. Butt Calls and Mistakes
Calling someone by mistake or receiving accidental calls is surprisingly common, when it comes to mobile phones. This can be embarrassing, cause confusion, or waste time. Texting or messaging mistakes can also occur. Part of the problems is due to the compact size of phones and people using them in busy situations where there are many distractions.
12. Hinders Sleep
There is good evidence that mobile phones contribute to sleep deprivation, especially when people use them late at night or in bed. Teenagers in particular need good sleep to help their developing brains, but offer suffer worst from mobile phone related sleep problems.

13. They Cause Accidents
People get engrossed by their phones when they walk around. They collide with things, bump into people, or even worse, step into the road without looking. The effects of distraction caused to drivers are even worse, as making or receiving calls or texts, or using the phone's other functions can all result in drivers not paying attention to the road and result in serious accidents.
14. Vicarious Living
Many people no longer seem to be able to just enjoy the moment anymore without the need to video, photograph, or write about it on social media. Pop concerts are full of people videoing. Once in a lifetime experiences are not fully appreciated because people are too busy photographing them and posting on social media.

15. Health Problems
Some studies suggest that the electromagnetic radiation produced by mobile phones causes harm to human health. Brain cancer has been cited as a possible effect of long term regular phone usage. However, it should be noted that there is no solid agreement on the level of harm that may or may not be caused by mobile phones.
16. Under Surveillance
Mobile phones are increasingly used to track people's movements. This may seem fine for catching criminals, but it is another step towards a surveillance society, where citizens have no privacy and don't even know when or who might be tracking them, never mind possess the ability to challenge the threats to their privacy.

17. Conflict Minerals
Certain rare metals are required in the production of mobile phones. The control of these metals has caused conflict, especially in the Democratic Republic of Congo, where 5.5 million lives were lost in the Second Congo War, a conflict fueled in part by disputes over the control of the rare metals.
18. Youth Crime
There was a time when teenagers and children carried nothing of value, but now most have mobile phones, and quite often expensive models. This makes them vulnerable to street crime and general theft. It is a major problem in cities and urban areas.