VoIP (Voice-Over-Internet Protocol) is actually an Internet telephony system that will allow you to make phone calls cheaper or without cost. Since VoIP has now been developed, you can communicate using VoIP on your computer instead of using your phone.
VoIP is free when you use it with your PC and also with mobile phones and land lines (sometimes), but if it is used to replace the PSTN, it would cost.
However, the price will remain low compared to the normal costs of telephone calls, which means that many people enjoy telephone calls without worrying about the price.
VoIP has many different providers, which means that the prices of each call may vary.
If you connect VoIP to VoIP, it is usually free with most service providers. When it comes to making international calls, the fees are different for each country in each VoIP
If you use VoIP over a computer instead of a phone, you can communicate with others at no cost. This happens with most calls, but even if you have to pay in some cases, it will be generally cheap.
If you have a VoIP account with any VoIP provider, you can call anywhere in the world using this account with a broadband connection. According to government law in some countries, especially in the Middle East, the use of VoIP is prohibited. You can link VoIP charges with the help of VoIP related sites.
The most important thing is that you need to find the right VoIP provider that fits your situation (call requirements, fees, etc.) before using it because of the variation in call charges from country to country per minute.
If you want to use VoIP over your computer, you need to download and install VoIP provider software then register your account, check your phone number, then get your number (local access), and finally buy a credit. With VoIP, you can call landline or mobile phones anywhere in the world. Calls to landlines will be cheaper than calls to mobile phones.
After the introduction of 3G technology, high-speed mobile networks and Wi-Fi, of course, can access voice over IP over advanced mobile phones. For example, if you use an application, you can connect from anywhere to anywhere using iPhone 4. Many VoIP providers give local access numbers that can be a local land number for that particular city or can be a toll-free number
However, it is very easy to make VoIP calls from your iPhone using applications such as Skype, and VoIP over mobile, call and talk at one, thanks to the introduction of Iphone4. With the use of VoIP and similar applications, you can easily log in with your VoIP provider and can make calls anywhere. For high-quality calls, you must have a Wi-Fi or 3G network.