In rare cases, the Wi-Fi setting on your iPhone, iPad, or iPod touch may be grayed out or grayed out. If you go to the Settings -> Wi-Fi menu, the toggle switch will be turned off without the possibility of activating the wireless connection.
If this happens, the iOS device does not allow using the Wi-Fi interface. In the iOS 7.1 operating system, the “Wi-Fi not available” message may appear in the Control Center. How do you solve an unpleasant problem? First of all, check that the "Airplane mode" toggle switch is in the "Off" position by going to the main section of the iPhone and iPad. After that:
1. Install the latest version of iOS
The first thing to do in such a situation is to check that the current version of the operating system is installed on the device. With each update, Apple fixes system errors, makes the OS more stable. After upgrading to the latest OS, the problem may resolve itself. Go to Settings -> General -> Update. Here you should see the message "Latest software installed". If your device does not have access to the Internet, connect the gadget to your computer and check for updates in iTunes.
2. Do a hard reboot
A hard restart of the device, which will reset temporary data, will help solve the problem with an inactive Wi-Fi indicator. To make a Hard Reset, you must simultaneously press and hold the top "Power" button and the "Home" button. Hold them together until the Apple logo appears on the display.
3. Reset network settings
In a situation where the Wi-Fi setting is grayed out, resetting the network settings may result. The operation is quite simple and can be done on the gadget itself. Follow the procedure from the Reset section of the iOS main menu. To do this, go to Settings -> General -> Reset -> Reset Network Settings. This will reset all network settings, including information about connected Bluetooth devices, Wi-Fi passwords, and VPN and APN settings.
4. Full iOS recovery
If resetting the network settings did not help, you need to perform an operation to return the iPhone and iPad to its original state - reset the operating system. You can clean your mobile device through iTunes or by means of the OS itself. In the latter case, you need to go to the Settings -> General -> Reset menu. Various parameters are available here for "zeroing" the system. You can learn more about this.
5. Repair
If none of the above methods helped, it is probably a hardware failure. Most likely, the problem is with the Wi-Fi module itself. To determine a specific problem, you must contact Apple for support and technical service or the nearest service center, where specialists will diagnose and repair the device.
Usually the owners iPhone(no signs of damage) there are no complaints about the cellular communication or the Wi-Fi module, but sometimes annoying incidents do occur. The problem manifests itself in different ways: in the form of a connection icon that has suddenly become gray and inactive, routing failures, and incredibly slow speed.
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And sometimes the phone simply cannot connect to any of the wireless networks operating in the district, although they are detected. There is no single reason for these failures, often problems arise completely spontaneously and this has nothing to do with the model. iPhone nor with version iOS... In the vast majority of cases, everything is solved by an elementary reboot or reset of the network settings. 
True, it is likely that the cause is a hardware problem, in this case, contact any reputable one for help. However, you shouldn't get upset and give up in advance, fortunately, there is an instruction on "first aid" to the flabby Wi-Fi. What if you're lucky.
1. Reboot
The easiest, logical and fastest way to eliminate most temporary glitches during device operation is to reboot (turn off and on). It is enough just to hold down the "Power" button and hold it for several seconds until the " Switch off»And turn off the device. If the device "freezes", then you need to hold down the Power and Home buttons for 10-15 seconds to force shutdown.
Usually, after turning it on, everything works fine and you just need to click on the Wi-Fi connection icon again.
2. Reset network settings
Do not forget that a general reset of all settings leads to the deletion of important information - IP address, data on DNS servers, etc. Therefore, it would be quite logical to carry out only "Reset network settings", this item is located along the path: Settings -> The main -> Reset -> Reset network settings.
Now that the network settings, among which there could be erroneous data, have been reset, in theory everything should work as normal. We connect to Wi-Fi and check, and if the problems continue, go to the next step of the instruction.
3. Backing up and restoring data
Not all ordinary users understand the meaning of this function, many are even annoyed by the need to spend time and effort copying data. However, this technique was invented for a reason and in some cases it is a real "magic wand" in solving complex problems. Usually a cloud service is used to store backups. iCloud, but for a situation with a non-working Wi-Fi, it is worth putting another copy in advance in advance. iTunes.
Having two backups is preferable to one - following the standard instructions, create one on iCloud and the second on iTunes... Now, if something happens to the Wi-Fi settings, network connections or other system data, it is enough to simply restore the data from the saved array. The process is simple, but it takes some time, depending on the amount of information that is sent to the cloud and back. 
A variation of this method is a complete reset of the smartphone settings, the device becomes identical to the "out of the box" option. Yes, this somewhat complicates the task of restoring all your information, however, if after such a procedure the Wi-Fi connection works fine and there is a backup copy, there should be no problems. However, there is a possibility of creating a rare but unpleasant situation in which the glitch is directly related to the data inside the backup. That is, when resetting to the factory settings, Wi-Fi will work fine, but the entire amount of information will have to be restored manually, bit by bit - you will simply have to forget about the faulty copy.
4. Is the problem with Wi-Fi still not resolved? Reboot the router
Sometimes the source of glitches is not a smartphone, but a Wi-Fi router, a third-party device with its own firmware, which also has bugs. You can try to solve the problem by simply rebooting it, by turning off / on the power. If a connection is established, but the data transfer rate is suspiciously low, it makes sense to tinker with the settings of the DNS servers. True, this is a malfunction of the network equipment, and not of a smartphone or tablet, so the system administrator must deal with its correction.
If other devices connect to the Wi-Fi router without any problems, and a particular iPhone or iPad is still junk, it's time, unfortunately, to contact the service center.
In today's rhythm of life, most of us cannot imagine existence without the Internet. Large and small companies are equipped with computer services through the worldwide network. A huge percentage of the advertising tool, again, the merit of the Internet. Communication on social networks, information on free topics and more, we can use all this thanks to the connection to the network. Wi-Fi is one of the ways to connect computers, tablets, phones ... to the Internet. And of course, depriving this opportunity leads to a failure in our system. Not arbitrary, a blackout can bring a lot of trouble and losses. And not a small part of users are Apple customers, and as a result, the owners of iPhones. Consider the characteristics of the iPhone 4s and possible problems connecting it to Wi-Fi.
The iPhone 4's Wi-Fi issues are nothing new. The possible reasons for this are various. Wi-Fi connection problems can manifest themselves as a lack of signal, i.e. this is when the device does not see the network, or maybe vice versa, recognizes Wi-Fi, but there is still no signal. Sometimes the Wi-Fi icon just freezes. However, problems can be different and their occurrence for different reasons.
If Wi-Fi does not turn on on the iPhone, then this is most likely due to:
1 Hardware reasons (associated with breakdowns due to mechanical damage, that is, cracks, chips, just blows of the device, getting into water, damage along the power circuit). 2 Software reasons (factory defect, failure or firmware error).Methods and methods of troubleshooting depend on the indicators of malfunction, their causes. They may not be identical and the degree of resolution of problems with wi-fi connection is completely different. And as a consequence, the very manifestation of these problems may not follow a pattern.
Remedies
If Wi-Fi does not work on iPhone 4s, there are multiple causes of breakdowns and ways to fix them. For example: due to software features, there was a problem with wi-fi. What can be done when the Internet on the iPhone 4s does not work, for this reason, you can resort to flashing. First, save all the files you need so that they are not lost during reinstallation. Then connect to your computer and follow the system guidelines to restore the firmware. Problems of this kind are mainly detected on the fourth and less often on the iPhone 5 and iPhone 5s.
If, nevertheless, the reason why the Internet does not work on the iPhone is associated with hardware failures, then a more detailed and deep dive into the essence of the problem is necessary. And this is done by repairing the device. Repairs take place in the workshop. An experienced specialist carries out complex work with a microcircuit, parts of an electronic device and takes a certain amount of time. Experts in this field are often involved in the elimination of this problem. But before spending money and time on a trip to the service center, you can try to fix all the problems associated with Wi-Fi yourself. But it should be noted that this will void the warranty for service and return in the event of iPhone malfunctions. So, if you nevertheless decide to fix the iPhone 4 yourself, you must be careful and strictly follow the recommendations on this topic.
The first method, when you take an ordinary hair dryer (by no means a construction one) and start to influence the iPhone with a hot stream of air, the mode is maximum. After that, a warning about too high a temperature should appear on the display of the device, this will be a signal to the end of the temperature attack. Next, you need to reboot the smartphone. The device should connect to Wi-Fi.
The second method seems to be simpler, but also less effective. You need to take your defective iPhone and place it in an ordinary refrigerator for 15 minutes. Then, just as in the first case, restart the device. The device will now function properly.
If the above methods did not help, then you may have to fix the breakdown with more complex manipulations. Of course, if you have previously resorted to repairing faulty electronic devices, problems will not arise. But in any case, we will try to present the entire scheme for repairing an iPhone in the most accurate form.
Hard reboot method
A simple reboot, of course, at this stage of the fix will not help. Here you need to turn off the iPhone by simultaneously pressing two buttons, "Home" and the shutdown button. After that, at startup, everything should return to normal.
Or by synchronizing your device with a computer via iTunes. After connecting, the system should give an option to restore and update the iPhone. We press and wait for the update to occur. Further, when the wireless network is turned on and detected, the electronic mechanism should work as it should.
Repair of a gadget by unscrewing the case
There are special tools for microcircuits and unscrewing the case in the form of screwdrivers. You can buy them in a specialized store. We need two types of screwdrivers of the offered tools. This is a Phillips screwdriver and a dedicated smartphone screwdriver. So, using a Phillips screwdriver, carefully unscrew the nuts securing the device case. We try to put them separately and all together, so that they are not lost. Then we open the front cover and find a small square under a thin black film, all movements must be careful with this complex electronic system. This is the board of the Wi-Fi module, which we have to heat up strongly with a hairdryer. We remove the film from the board and use the same technology as in the first method to start heating. The task is to warm up this particular square and press with a piece of cardboard or other material. We need that, under the influence of pressing, all the loose contacts are connected and, as they cool down, firmly contact. After the mechanism has cooled down, you can try a smartphone control check. Wi-Fi should work.
Other reasons why Wi-Fi does not work on iPhone 5/6 and more often version 4
Perhaps this is due to a more complex operating system that is not entirely compatible with the old device, hence the crashes, system errors. Various malicious programs can also interfere with the operation of the gadget. Be careful when working with unverified sources of applications and downloads. Keep in mind that Apple has taken this potential problem seriously by ensuring that users can only use their native apps and applications. Don't pump your sensitive enough iPhone 4s with left-handed programs. Subject to all the recommendations, the device, that is, bluetooth, wireless Internet should work clearly.
Note that the main reason for the breakdown is related to the wireless network and Bluethooth of the series in question, namely the iPhone 4s in the contacts of the Wi-Fi module board, their disconnection. That is eliminated due to the method of temperature exposure to the details of the device. But nevertheless, if you are not sure of the reasons and that you can cope, we advise you to contact the specialists.
Articles and Life Hacks
Apple device owners rarely experience any kind of cellular or Wi-Fi malfunction - unless they are caused by physical damage, of course. However, sometimes there are complaints that Wi-Fi does not work in the iPhone, or it does not work correctly - for example, if either the data transfer is very slow, or there are routing failures.
Our article is devoted to the reasons why this module may not work, as well as to finding ways to solve this problem.
Why may wi-fi not work in iPhone?
Sometimes our mobile device simply cannot connect to any of the available Wi-Fi networks. It is difficult to unequivocally name the reason for such a failure. Most often, the problem can be easily fixed after resetting the network settings, or after an elementary reboot of our mobile device.
However, it happens that the problems are related to the hardware of the smartphone. If so, you need to contact an Apple Service Center. Well, before that - try to provide our device "first aid".
What to do if Wi-Fi does not work in iPhone?
So, the most logical and obvious way of "first aid" seems to us to be the usual reboot. She will easily cope with those problems that are temporary. It will be enough just to hold down and hold the Power button for a few seconds.
It happens that the device "freezes". In this case, it is necessary to simultaneously hold down Power and Home for about 10 seconds. After that, a forced shutdown of the device will occur. It can also help if due to incorrect settings.
If Wi-Fi still does not work in the iPhone, you must try to reset the network settings. Note that with a general reset, all important data from our device will be deleted - including passwords, IP address, etc. This is why it is recommended that you only reset the network settings.
To do this, go to the main settings of our device, the "Reset" item, and select the "Reset network settings" option. This will help get rid of possible data errors. Now you need to try turning on Wi-Fi again. If this, again, did not help, proceed to the next step.
Unfortunately, not every user knows why they need to back up their information. However, this function was invented for a reason, because it allows you to save the most important data. To store them, the "cloud" service iCloud is usually used, however, especially in case the Wi-Fi connection will not work (and, accordingly, the Internet will not work), it is recommended to take care of an additional copy in the iTunes library. Now, if something happens to our settings or needs to be reset, you can easily restore all important information.
So, resetting the network settings didn't help us. This means that we will need to completely reset all settings. There are widespread cases when after such a reset and full data recovery, Wi-Fi starts working. Unfortunately, there are also known cases when problems are caused precisely by errors inside the backup. In other words, after a general reset, we will be able to connect to Wi-Fi, but all information will have to be restored manually, which will significantly slow down the process.
If the problem is still not resolved, you can try restarting our router. The same can be done at the very initial stage. Of course, it is very convenient if you have a desktop computer at hand, and you can immediately check if the failure is caused by a problem with the router.
If the connection is successful, but the speed is very slow and the problem is not related to the provider, you can try to work with the settings of the DNS servers. Of course, this will require some experience. In the event that the problem has not been resolved, you need to contact the service center or replace the router.
Occasionally, some iPhone users have all sorts of problems connecting to wireless networks. There are situations when the Wi-Fi connection disappears, the Wi-Fi on / off toggle switch may be blocked, available wireless networks are not displayed, or the phone simply does not connect to Wi-Fi.
There is no single reason for these problems. But in most cases, this is all easily fixable. Here are some ways to troubleshoot iPhone wireless problems.
Press and hold the power button and home button at the same time until the iPhone restarts.
Once the iPhone restarts, it will try to connect Wi-Fi again. In some cases, this immediately solves the problem.
Reset network settings
Your phone stores a huge amount of network addresses, passwords and other parameters, and, perhaps, because of all this junk, something was broken.
Open Settings and go to General, then select Reset Network Settings from the Reset menu.
When the network settings are reset, try connecting to the Wi-Fi network again. Everything should work, but if that didn't help, we have a few more tips.
Backup and recovery
While backing up and restoring your iPhone is inconvenient, it can often solve the most serious problems related to your phone not working properly.
Back up your iPhone using iTunes or iCloud and restore from it. Then try connecting to the Wi-Fi network again. This is not difficult at all, but it can take quite a long time.
If, nevertheless, this advice did not help you, then perhaps the problem is not at all in your iPhone. Check your router settings and reboot. Otherwise, the surest way would be to contact Apple support, describing the problem in detail.
