Why does the mobile phone not take (with no signal)?

The question of why the cell phone does not take may seem like a question with an obvious answer, but the cellular signal often behaves in a really strange way and deserves a more in-depth analysis.
I think it happens to everyone, in fact, to have for a moment five bars indicating full signal and then, just taking a couple of steps, to see the bars going down to two or less.
There are houses in which the cell phone does not pick up except in some corners or where there are dead zones, where the signal goes down to zero notches moving half a meter from a position where, on the other hand, it takes good.
For those who want to learn more, let's see here in simple and practical words, what are the factors that influence the intensity of the cellular signal, to understand why the cellphone does not pick up, why at certain points the phone has no signal or why reception can be a dancer .
READ ALSO: How to improve cellular signal or increase reception if poor
1) The distance from a cell
Each cell phone communicates using radio waves which, passing through the atmospheric space, become weaker and weaker.
This means that if the mobile phone is located very far from a cell, then the signal will be weak or even absent.
This situation is hardly created in the city, but it is very frequent in the mountains or in uninhabited areas, where the cells are far from each other and it can happen to be in an isolated area.
A cell phone can theoretically reach a tower that is up to 70 kilometers away, although due to the way cell phones work, the effective limit is reduced to 30 kilometers, even in perfect conditions without obstacles and interference.
Basically, if you are far from the cell, the only way to make the cell phone take a signal is to move closer.
In the city, however, distance is a negligible factor, because the cells are many and arranged almost on every street corner, so if the cell phone does not take well there is some other reason.
2) Impediments and obstacles to the signal (land morphology)
Radio waves travel in a straight line from the cell phone to the cell tower, if there is any major impediment such as a hill or mountain range, radio waves will have no chance of reaching the tower.
For the same reason as before, the presence of hills and uneven ground in the city should not cause any problems.
The problem with obstacles in the city is represented by houses and buildings, since concrete, steel and most building materials are excellent at blocking cellular signals.
This is why there is often no cellular signal in garages, cellars and basements.
If he does not take it home, the cell phone should go back online and find a signal by going near a window or balcony.
3) Differences between operators
The cells in one area can serve one telephone operator instead of another, so it may be that at a given point it takes Telecom instead of Wind or Vodafone instead of Tre.
It can therefore happen, always in more isolated areas, that only one operator is present, while the others have no signal due to the total absence of turrets.
We have already talked about this situation in the article on how to check the cellular coverage in Italy of Telecom, Tre, Wind and Vodafone
4) Time
Radio waves pass through the atmosphere and everything from which it is composed, including rain, dust and ionized particles.
The signal can therefore be disturbed during a thunderstorm and will always be stronger and more stable when the sky is clear, without rain and without fog.
5) Clogging
Cell towers, a bit like wifi routers, are also designed to handle a number of simultaneous connections.
While in richer or more populous areas, where there are many cells, this may not be a problem, different is the case in less populous rural areas.
The clogging of the cell is also the reason why in some tourist areas such as seaside holiday villages there may be problems with the cellular network, in particular for the data connection to the internet (for example in Puglia this summer I encountered this problem) .
In fact, it may be that the cells are few and cannot satisfy the seasonal users who come to populate a certain area only a few months of the year.
Other cases of clogging occur when, for example, you try to make New Year's greetings at the stroke of midnight or when you try to send an SMS or call or connect to the internet at the stadium or at a concert, where many people try to use the phone simultaneously.
6) Our movement speed
It is normal if, when traveling by car or train, the signal comes and goes.
Constant changes in position can have an effect on signal quality and the faster you go, the more unstable the cellular signal becomes.
7) Various interferences.
The radio waves of mobile phones can be disturbed if there are large, remote controlled machines such as cranes nearby.
If the large metal arm of the crane is moved to block electromagnetic waves, it can create a small shadow cone by attenuating nearby signals.
The radio frequencies of the crane, very powerful, can then disturb the radio signals.
8) Phone problems stabilizing the connection to a cell.
Signal problems can also be caused by the phone itself, which instead of remaining connected to the nearest cell, fetches radio waves from a more distant cell causing the reception notches to suddenly collapse.
In these cases, if we talk about Android smartphones, there are apps that can help to optimize cellular signal reception.
The cellular signal is a very complex thing to explain too, especially if we start talking about radio frequencies that we have deliberately ignored here.
There are many small factors that interfere with the cellular signal and that can. This is why one corner of your home may be a dead end, but another has a large signal.
Final question
You can increase cellular signal reception at home or in a specific environment "> on Amazon for less than 100 Euros.

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