The endless capabilities of the smartphones provide to the users many services and features. One of the most useful of which is the mobile VoIP technology. The mobile VoIP is a technology that allows you to make free or cheap calls using your cell phone, but not by using the network of the mobile operator and instead placing the call over the internet. The VoIP technology has established itself for a long time now as the perfect alternative for conventional telecommunication services, but providing many additional services and features. The mobile VoIP transfers all these features to the mobile devices so that the users can take advantage of them with their smartphones.

To use mobile VoIP on your smartphone you need to meet certain requirements. First and foremost you should have access to internet either by connecting to Wi-Fi network or the data network of the mobile operator. Keep in mind that the mobile VoIP technology uses a lot of traffic so an unlimited data plan or at least a monthly data plan with cap of around 4 – 5 GB. Besides connection to internet you will also be required to have a mobile VoIP app installed on your mobile phone. Fortunately, there are plenty of mobile apps available for all mobile operating systems that you can choose from.

The mobile VoIP apps are separated in two diffent types. Apps that offer their own VoIP services, and apps that just serve the purpose of medium so that you can use the services of a VoIP provider on your phone. The latter are known as SIP clients or SIP phones. Such apps allow you to load up setting provided of a VoIP operator on your smartphone, and thus allowing you to receive calls to your office number on your smartphone, or being able to call Spain landline numbers with VoIP techonlogy and paying less.

The other type of mobile VoIP apps provide their own services. These apps can be used to make free calls with other people using the same apps as you. Besides that these apps also offer the opportunity for users to make calls to conventional telephone and mobile numbers as well. One example of such app is Fring which can be used to make free calls to other Fring users or to call Greece and other countries with it.

Mobile VoIP technology is one of the most useful smartphone feature that allows users to make free or at the very least cheap calls.