How to Make VoIP and WiFi Calls Through Your Android Phone

If you think that your smartphone will work only in areas where there is cell service, well, you’re wrong. Nowadays, this barrier is eliminated with VoIP cloud-based telephony systems, provided that you know how to make it possible.

The key is to fetch an Internet connection at your location using the Internet bandwidth to carry your voice traffic.

Make VoIP and WiFi Calls Through Your Android Phone

If you are ready to switch to VoIP and WiFi calls but still not sure how to do it properly or what app is best to use, you can try virtual number Freeje App. Freeze Optimum is an excellent and quality application. It has a user-friendly interface that is so easy to navigate and has various functions. So head to the Google Play Store and download the Freeje App and start to experience high-quality calling.

Method of calling

Voice over Internet Protocol (VoIP) is a type of calling that uses computer networks rather than traditional telephone lines. Therefore, you are abandoning your weak cell signal and routing your voice traffic over a WiFi router and down into the depths of the Internet pipe.

You can set this up in two ways. A standard commercial VoIP technology is SIP or Session Internet Protocol. Unlike SIP, which can be complicated to set up with cryptic settings, IVR is easier to set up.

What is VoIP or WiFi calling?

Telecommunications were initially used to send telegrams and later to make calls on the telephone before the Internet became a popular communication medium.

In other words, it was before the advent of the modern Internet. Voices were analog, meaning they were sent through copper cables to the phone exchange. Some people work as operators who receive your incoming call and connect it to the outgoing destination, thereby establishing a continuous circuit from your side to the receiver’s side. The system is known as a circuit-switched network.

In the early days of the Internet, data was sent as packets (bits of information). Afterward, it sends them one by one over the same copper lines (dial-up Internet). Thus, packet switching is the term for this type of network.

VoIP is short for Voice over Internet Protocol. INTERNET, also known as the Internet, is the technical specification that sends data from one network to another.

During the evolution of technology, telephone operators and telegraph companies realized that there was not enough copper for each customer to run their cable as the demand for telephones and voice communications increased. It happened because each continuous run of copper cable had only been meant for one pair of users (similar to how kids play with pretend telephones by tying strings between cups at either end).

So they decided they will use a single core network and run cable only from each person’s house till the telephone exchange. That way, cables’ efficiency, and the economy were improved. But suppose the voice was broken down into packets. In that case, it could be transmitted similarly to data, further reducing the infrastructure needed to offer telephone and Internet services to customers simultaneously. This is the essence of VoIP.

WiFi calling

WiFi calling is similar to VoIP. VoIP has several different protocols that enable voice to be transmitted identical to data packets. Another thing about WiFi calling that you need to know is that it is different in VoIP. Your voice packets are sent between you and the recipient over the Internet. In WiFi calling, your voice packets first go as VoIP to your operator, who then charges you for that call as if it’s still a regular voice call. Then, they forward your voice packets to the recipient over their private network, rather than the recipient public Internet.

So say you are a subscriber to ISP-A, which gives you WiFi and Internet access, and you have a SIM card from a telecom company B. You are connecting to WiFi at home/office, and the call you are making is from your phone dialer.

The following steps take place:

  1. Your voice is recorded by the mic in your phone and processed into bits of data. This is the digitization of an analog signal (sound). I won’t go into the details of the PCM (pulse code modulation) or the other formats in which the voice is encoded.
  2. Then, the bits of data generated are encapsulated and converted into IP packets. Now it looks and behaves similar to other IP packets created by the various apps on your phone. Of course, to ensure good performance, quality of service (QoS) parameters are involved.
  3. The packets are further encapsulated as Ethernet packets and transmitted over WiFi to your modem, from where it is sent to your ISP’s routers, servers, core network.
  4. Your ISP A records the number of packets coming in and out as bandwidth/data consumed from your Internet plan.
  5. Your ISP’s network would be peering with company B at some Internet exchange somewhere. Here your packets are handed over to company B.
  6. Your data packets now are in the core network of B and will be routed over to where your recipient is located. Simultaneously, you will be billed for the call by company B as if it’s a regular call.
  7. Assuming that your recipient isn’t using WiFi calling and is connected to the regular 4G tower of the same company B.
  8. The packets are sent over 4G (VOLTE) to your recipient’s phone and then decided to ultimately deliver the voice parcel to your speakers.

If your recipient also is using WiFi calling, things will be a little different. First, company B has to hand over the packets to your recipient’s ISP, who will ultimately hand it over to your recipient over WiFi.

Suppose your recipient has a sim card from another company. In that case, the packets will be handed over to that network from the core network of your company B.

2G and 3G still use circuit-switched networks. So if your recipient is on such networks, then the call complexity increases further.

With the right dialer app such as Freeje on our phones, we can automatically turn on WiFi calling. Google publishes even a short guide. The steps to follow once you are in your dialer application are as follows:

  1. Tap the three-dot icon that appears along with the More button.
  2. Navigate to the Calls section in your Settings menu (the name may vary depending on your device).
  3. Toggle WiFi calling on by going to the WiFi calling options.

Before you can try Android WiFi calls, you may need to clarify your decision further. When WiFi is not available, your phone may rely on carrier data instead. Having unlimited access shouldn’t be an issue, but you may want to switch to using your cell phone when you roam.

Final Words

In our current situation, switching to VoIP and WiFi calls provides us with significant savings in terms of call charges. And if you’re running a business, VoIP undoubtedly brings tremendous advantages for you.

But be reminded that for you to call someone using an app, they must also use the same app service. Because calling from VoIP Android works in that way.


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