Today, although the coverage of the operators has expanded, we may have difficulties in communicating when we are far from the settlement or geographically in places where the network cannot reach.The main reason for this is that operators position their base stations in places with high density of people.Thanks to the base stations located in the city or close to the city, our phones can capture sufficient network signal in dense residential areas and thus we can make calls without any problems.So what do we do when there is no base station or an occasional obstacle?The solution is simple: Wi-Fi Calling.Smartphones have been coming for a while with a new technology called Wi-Fi Calling.Even though you have seen this technology many times, you may not have any idea what it is.Wi-Fi Calling allows our smartphones to connect to the telephone network via our internet modems, in cases where they cannot catch a network signal.In this way, you can make voice calls, send and receive SMS even if your phone is not picking up.Wi-Fi Calling works similarly to VoIP.Our smartphone transmits cellular data packets over the internet network where we are connected to the Wi-Fi network.Then the data is sent to the other party and the conversation is made.The Wi-Fi Calling feature can come to your rescue in many situations.As we mentioned above, it allows you to communicate in geographical points where there is no network but fixed internet service.In addition, you do not have to deal with network problems when it is rainy and the weather is closed.However, you can communicate by avoiding the base station densities experienced in natural disaster situations.Perhaps the biggest advantage of Wi-Fi Calling is that it extends the battery life of our smartphones.A weak network signal is a huge annoyance for your smartphone.For this reason, your smartphone consumes more battery power to capture more signals.However, Wi-Fi Calling avoids this problem and extends battery life.You can even extend battery life even further by using Wi-Fi Calling whenever you are connected to a Wi-Fi network if you select the “Preferred network Wi-Fi” option.Another advantage of Wi-Fi Calling is that it supports HD audio.Since voice packets are transmitted to the network system over the internet network, you can benefit from HD voice technology if Wi-Fi Calling is turned on or VoLTE is turned on on the other side.HD voice technology allows increased sound quality in voice calls.In addition to these advantages, although the technology is called Wi-Fi Calling, you can send and receive your SMS messages without losing the network thanks to this technology.In other words, it is possible to continue messaging if you are connected to the Wi-Fi network at a time when your phone is not picking up.Another advantage of Wi-Fi Calling is that it works in Airplane Mode.As we said, Wi-Fi Calling is used when there is no network signal or when Wi-Fi network is preferred directly through the settings.So you don't need to be connected to the network.For this reason, you can put your smartphone in Airplane Mode.In this way, you can gain extra battery life and charge your phone faster.However, let's not forget that all wireless connection technologies are disabled on your phone that you put in Airplane Mode.So in order to use Wi-Fi Calling, you need to turn on Wi-Fi after turning on Airplane Mode.After this step, you can use your phone without any problems.Although your smartphone supports Wi-Fi Calling, you cannot start using it even if you turn on Wi-Fi Calling service through your operator.In order to use this feature, you must activate the Wi-Fi Calling feature on your smartphone and be connected to a Wi-Fi network.To activate the Wi-Fi Calling feature on Android smartphones, you must first be connected to a Wi-Fi network.If you have activated the Wi-Fi Calling feature in your operator, we can proceed.We have progressed through the Samsung Galaxy S21 in this guide, but the process is the same for almost all Android smartphones.After Wi-Fi Calling is active, if you see the Wi-Fi Call symbol with the phone handset and the Wi-Fi symbol together in the icons on the top right, you can now make calls and messages over Wi-Fi.When the Wi-Fi Calling feature is activated, the connection priority is given to the mobile network.So in case you do not have access to the network, Wi-Fi Calling becomes active and you communicate.However, if you want to use Wi-Fi Calling even if your home or office has a network, you should choose the preferred network as Wi-Fi.There is a similar operation in iPhone phones as in Android.First of all, your smartphone must be connected to a Wi-Fi network.If you have activated the feature in your operator, you can start the process.After completing the procedures, you can use the Wi-Fi Calling feature.All current smartphones today support Wi-Fi Calling.However, it is possible to use this technology on some older devices.One way to find out if your device supports Wi-Fi calling is to search for Wi-Fi Calling in Settings.If that setting appears on the Settings menu, it means you can use it.In addition, some manufacturers have started to offer this feature to smartphones with updates.For this reason, first make sure that your phone is up to date, if there is an update available, try again after installing it.There is no technology that needs to be supported on modems for the Wi-Fi Calling feature.You can use this feature with any wireless modem that you can connect with your smartphone.If you are having a problem with Wi-Fi Searching, you can start by changing your DNS servers over the modem first.Some DNS servers may cause the Wi-Fi Lookup feature not to work or you may experience some problems while calling.At this point, you can avoid these problems by choosing a few DNS servers that we can say without problems in Turkey.Among the DNS services that have high performance and run smoothly in Turkey are Google, CloudFlare and OpenDNS.While Google is the best in terms of latency, CloudFlare generally works better.However, this can vary even regionally, so choose the servers that work best for you.However, the high wireless signal performance of the modem you will be connected to is important for Wi-Fi Calling.In other words, if you are using a weak modem, you need to switch to a better modem or solve the signal problems of your current modem.If you do not know what modems are compatible with your internet, you can contact your internet service provider and even buy a modem through your service provider.For example, TurkNet allows you to avoid these problems with the Zyxel VMG3625-T50B modem that it offers free with GigaFiber and at an advantageous price for other users.In addition, this modem is compatible with ADSL, VDSL and fiber internet.TurkNet is a company that frees users to use their own modems.However, for users who want to change modems and routers, they have a solution to meet your needs by leaving compatibility problems aside.The Zyxel VMG3625-T50B modem, offered for sale by TurkNet with a cash price in addition to the invoice, is fully compatible with both ADSL, VDSL and fiber internet, namely TurkNet's GigaFiber service.Combining the definition of modem and router in a single device, this product enables users to connect to the internet quickly, regardless of infrastructure type.Moreover, the privileges are not limited to this.When a person who is an ADSL user wants to switch to VDSL service after his infrastructure has improved, he will be able to continue on his way with the existing device without incurring any additional costs.It should be noted that the modem is fully compatible with the 1000 Mbps speed offered with TurkNet GigaFiber.TurkNet, one of Turkey's successful service providers, offers the GigaFiber service, which it launched with its own infrastructure, for 139.90 TL.Moreover, the promised speed of up to 1,000 Mbps is not only available in download speed, but also in upload speed.GigaFiber service, as in other services of TurkNet, is a non-committal service and TurkNet covers the part of the commitment cancellation fee up to 1.000 TL in case you switch from a different operator.If you have TurkNet GigaFiber at your address, you can submit your application to become a TurkNet member immediately.You can inquire about the infrastructure and speed you can use at your address from the internet service provider's website.So how is this done?TurkNet, one of the leading internet service providers in Turkey, has an infrastructure query system that indicates which technology and speed your infrastructure supports before the internet application.Thanks to this system, you can see whether the infrastructure in your address is DSL or Fiber.TurkNet's infrastructure inquiry system works in two ways;Inquiry with address and inquiry with fixed phone number.Infrastructure query operations with both methods are as follows;TurkNet's infrastructure inquiry system can be made via both an address and a fixed phone number, as we mentioned above.However, most customers today no longer use a fixed phone line.The most common option, the infrastructure query by address, is as follows;After entering the infrastructure inquiry system, click on the Inquiry with Address Information option from the Inquiry by Address Information and Inquire by Phone Number options.From here, fill in the information about the city, district, neighborhood, avenue, street, building and flat numbers and click the Inquiry Infrastructure button.When the query process is finished, you will see a screen like this;A VDSL infrastructure service that supports speeds up to 80 Mbps was found at the sample address we questioned.TurkNet offers internet service at prices starting from 139.90 TL.In addition, let us state that your building, apartment installation and modem are also important in addition to your infrastructure quality when using the offered speed at home.TurkNet's infrastructure inquiry service offered us the Özgür İletişim 100 package for our 80 Mbps internet installation.This part will vary according to the estimated speed and infrastructure type that will appear at the address you inquire.Just below, you can see the services that remind TurkNet that it does not set quotas and commitments, and also offers a 100% refund option within 30 days.In addition, in the VDSL tariff offered to us, we see that a withdrawal fee of 240 TL is covered in case we switch from other internet service provider operators.This fee is 1.000 TL for users who switch to GigaFiber service.For this process, after entering the infrastructure query system again, click on the Inquiry by Phone No option from the Inquiry by Address Information and Inquire by Phone Number options.From here, you can learn your infrastructure query result by entering the home/work phone number registered to your address in the Enter landline number field.The speed supported by your infrastructure indicates the speed of internet service you can receive at home.However, if your infrastructure develops or your transition to fiber infrastructures is provided, you can go up to 1,000 Mbps.Customers take the first step to transition to TurkNet by following the application steps on the website or using the application method over the phone.Then, TurkNet offers an effortless transition process by managing the entire transition process for customers.In this way, you can switch without the risk of losing the current port allocated to you and your internet is almost never interrupted.However, the withdrawal fees of the users who switch to TurkNet at the current internet service provider operators are paid by TurkNet up to 1,000 TL for TurkNet GigaFiber and up to 240 TL for other infrastructures.You don't need to get up at all.You can switch to TurkNet without canceling your current internet subscription.First you make your application, then it is enough to sign the operator change documents that come to your door by courier.TurkNet sends your change request to your operator after receiving your voice confirmation, and your transition is completed by responding to this request within 48 hours.The transition process from different operators is also the "How Can I Become a TurkNet Member in 3 Steps?"It proceeds similarly to the one in our guide.Before proceeding with the subscription application process, you can take a look at the tariffs you can pass and the amount of speed you can use by making an infrastructure inquiry.If you are getting service over Kablonet, Superonline or Vodafone fiber infrastructure, operator changes cannot be made.If you switch to TurkNet without canceling your current internet subscription, you will gain many advantages.First of all, your subscription process takes much less time than a new subscription.Since you already have a port that you are using, you will not lose it either.Plus, you don't pay the setup service fee that is in zero subscriptions.You do not need such a service, as there will be no new installation.As we mentioned in the first stage, you can apply through two channels: the website and the 0850 288 80 81 phone line.Users who want to apply online can perform their transactions through this page.The online application process in 4 steps is as follows;TurkNet requests your contact information in the first step of the online application form to prepare the service interview.Accordingly, your Name/Surname, e-mail address and phone number are requested.In addition, at this stage, you approve the personal data disclosure form and the processing of your data.In the second stage of the online application form, you need to enter the information of your current internet operator, if any.It will be sufficient to select the Internet Available option and enter the service number (XDSL number) of the current internet service provider.In addition, TurkNet covers the commitment cancellation fee of up to 240 TL in case you switch from a different service provider, and up to 1,000 TL in case you switch to the TurkNet GigaFiber service.You can now move on to the next step.After filling in the address and information of your current internet provider, you can see the speed supported by your infrastructure.In the third stage window, you are asked to make your preferences as we mentioned above.In the Internet Speed ​​Selection section, you can see the tariff containing the speed supported by your infrastructure.You can choose your additional preferences from the Additional Service Selection section.For example, if you don't have a modem, you can buy a modem that supports both ADSL/VDSL and fiber speeds, offers high WiFi performance, and is a price-performance product with advantageous payment methods.In addition to these, you can choose fixed IP (static ip) service and secure internet profile.After these steps are completed, it's time for your billing preferences.You can request your invoice as a green friend by e-mail to your e-mail address.The fourth and final stage of the online application process involves authentication.At this stage, your identity document information and payment method information for the invoice are requested.However, if you choose the modem option in your preferences, this fee is charged to your card and no further payment is taken at that stage.TurkNet recently announced a new application system, in which users evaluate their infrastructure demands as part of GigaFiber infrastructure expansion efforts.With this system, users can enter their addresses and enable TurkNet GigaFiber infrastructure to come to their region.For this process, first go to TurkNet's I Want GigaFiber page.Click on the button “I want GigaFiber” in the middle of this page.On the page that opens, you will be asked for your address.After entering your address information, you will see a message with your current infrastructure status."Sorry, you don't have GigaFiber infrastructure "for now", as there is no GigaFiber infrastructure at our test address yet.You can submit your infrastructure request immediately.”We encounter the message.Just below this message, you must fill in your contact information to submit your GigaFiber infrastructure request.Then, read and approve the Personal Data Clarification Text and press the “I Want GigaFiber to My Address” button.That's all you need to do on the TurkNet website.All you have to do now is to complete your application using the verification link sent to your e-mail address that you provided during the application.TurkNet will evaluate the situation according to the demands on your address and add it to the list for GigaFiber works.The whole process is that simple.Sponsored by TurkNet, it has been prepared to be useful to Technopat readers: You can find our internet-oriented helpful articles in the https://www.technopat.net/turknet section.