Does a Phone Case Affect Your Cellphone Signal?

Getting a bad signal can be one of these things that just randomly happens but drives you crazy.


You know you have full bars, but your phone still won't load a web page or make a call.


There are a few things that can cause this, but is one of these your phone case?


As phone case experts here at anacotte.com, there's not much we don't know about phone cases!  so read on to find out the real answer as to whether a phone case can affect your signal.


Let's hit the brief first, before looking into more details.

Potentially, yes a phone case can affect your cellphone signal by blocking the phone's internal antenna, If it's a tight fit or has a specific kind of metal on it, where it acts as a faraday cage it can cause interference. Also If the case is thick, contains multiple layers or if the case has any kind of coating or treatment that could affect signal strength it may have an effect.

Anacotte phone case and signal

Ok so with the mini brief taken care of, let's start helping you understand a little more easily whether a phone case can potentially block your cellphone signal, by discovering what a phone signal is and how it works.

What is a cellphone signal?

In a nutshell, a signal is just a wave that transmits information. It can be blocked if there is something in the way of the wave that prevents it from reaching its destination.


For example, if you're trying to send a signal from your phone to a cell tower, but there are buildings in the way, the signal might be blocked.


A phone signal is created when your phone attempts to make a connection with a cellphone tower to send and receive data.


This data can be anything from a text message to a phone call.


For your phone to make this connection, it sends out a radio wave.


This radio wave is then received by the cellphone tower, which then responds with its signal.

“A phone signal is created when your phone attempts to make a connection with a cellphone tower to send and receive data”.

Can a phone case block your signal?

It's possible that a phone case could block your signal, but it's unlikely.


Phone cases are not typically designed to block radio waves, and most cases don't completely enclose your phone.


However, If your phone case is blocking the antenna, it's going to affect the signal.


The material of the case itself can cause interference, and if the case is a tight fit, it can block the antenna completely.


The same goes for any metal on the case. Metal can reflect or absorb radio waves, which means it can either interfere with the signal or block it completely.


So if you're having trouble getting a good signal, it's worth taking your phone out of its case and seeing if that makes a difference.

“Phone cases are not typically designed to block radio waves, and most cases don't completely enclose your phone.”

If you think your phone case is the culprit for why your signal is reduced then it could be one of the following reasons:


  • The case is made of metal: Metal can block radio waves, so if your case is made entirely of metal or has a large metal plate on the back, it could be blocking your signal.
  • Your phone case is interfering with the phone's internal antennas: If the case is tightly fitted around the antennas on your phone, it could be interfering with how the antennas work
  • It is made of a material that absorbs radio waves: Some materials, like rubber or leather, can absorb radio waves. This means that if your case is made entirely of these materials or has a large plate of them on the back, it could be blocking your signal.

How do I check my case isn't causing a bad signal?

One way to check is to make sure that you have a good signal before you put your phone case on, and then again after.


If you notice a difference in your signal strength, your phone case may be affecting it.


If you think your case might be blocking your signal, there are a few other things you can do to test it.


You can test whether your phone case is blocking your signal by holding the phone up to your ear without the case on, and then with the case off. If you hear a difference in sound quality, then the case is most likely blocking your signal.


You could also try making a call without your case. If the call quality is better without the case, then it's likely that the case is causing the problem.


Try moving around while holding your phone. If the signal is stronger in some locations than others, that could also be an indication that your case is to blame.


Finally, you can try using a different phone case. If the new case doesn't improve your signal, then it's likely that something else is causing the problem.

“One way to check is to make sure that you have a good signal before you put your phone case on, and then again after"

What else can cause a bad signal?

Several other factors can affect your cellphone signal.


If you're in a rural area, if there are tall buildings or hills between you and the nearest cell tower, that can weaken your signal. Bad weather can also play a role - if it's raining or snowing, that can impact your signal strength.


If you live in an area with poor cell coverage, that could be the problem. Also if you're in a building with concrete walls or metal siding, that can block signals.


Distance from the cell tower can also affect your signal strength. For a signal to work properly you need to be within a certain distance from the cell tower. If you're too far away, the signal will be weak.


The distance you need to be for your cell phone to work properly should be no more than six miles.


If you're further away than that, you may need to use a signal booster to improve your signal strength.

What can I do if I've got a bad signal and it's not my phone case?

You could also try restarting your phone. This can sometimes clear up any software issues that may be causing signal problems.


If you're still having trouble, there may be other factors affecting your signal.


One common issue is that your phone's battery may be low, which can impact the signal.


Another possibility is that your SIM card may be dirty or damaged, which can also interfere with your signal.

And to end on…

If you're still having trouble with your signal after ruling out these other factors, then it's time to consult a professional.


They can help you figure out what might be causing the problem and how to fix it.


You may even decide it's time to get a new phone case! If so head over to our store to find a full range of good quality, affordable phone cases including new styles, new aesthetics, and state-of-the-art technology.