Smartphones.Is a good invention?

Nowadays, most of people have mobile phone (for not to say everyone). In my opinion, we must be careful, because smartphones have a lot of advantages but also a lot of disadvantages.
On the one hand, one of this advantages is that we have internet conexion everywhere, and we can communicate with our family, friends everyone that we want to do it. A further advantage is that we have the opportunity to take instant photos without the necessity of taking them with a good camera, because some smartphones have an amazing quality to take photos. Finally, other advantage is that when we have an emergency, smartphones are a good way to look for help, because the new technology has a lot of gadgets for emergencies.
On the other hand, sometimes smartphones can be addictive, because a lot of people say that they cannot live without mobile phones, and it is so sad.
Also, many people, when they are with family, friends... most of the time, they are looking at their mobile phones all of the time.
Another disadvantage is privacy. We must be careful because hackers exist, and tthey can do everything they want with our photos, videos, programs...etc.
In conclusion, mobile phones are a good way to stay informed with news, problems of the wrld, family, friends... but we also need to be careful with how we use them.