Voice over Internet Protocol (VoIP) is a way of making phone calls over the internet, rather than through the public switched telephone network (PTSN). VoIP services offer free or low-cost calls overseas, as well as locally.
However, there are many variables that can compromise call quality, including internet congestion and poor reception, and some users have reported continuing problems.
There are many VoIP options available. Some services require both the maker and receiver of the call to be using the same service, while others allow you to call any phone number in almost any country. We take a look at two of the options available here in Australia:
VoIP veteran Skype remains a firm favourite with many CHOICE members. When you download Skype on your computer (or as an app on your tablet or phone), you can make voice and video calls directly from one user to another for free, or call landline or mobile phones around the world at cheap, per-minute, or flat monthly rates. You can even make group video calls.
Skype also sells dual mode phones which give you a normal phone plus VoIP on a single handset. The main advantage is that the handset isn't physically connected to the computer. One Skype user shared a positive experience with this setup. "It's generally quite good, although the line is never as clear on Skype as it is if you call on your landline," he said. "Sometimes you have to call a couple of times to get a clear line without any noise, and sometimes it cuts out mid-conversation."
Why you'd use Skype
- Skype is cheap and easy to use.
- It allows you to call regular phone numbers, although this service does cost money.
- As it is hugely popular, there's a good chance you can make free calls to your Skype-ing friends.
- Skype Number is a paid service that gives you a normal landline phone number that people can dial, which is diverted to your Skype account. This is a good solution for those wanting to set up cheap calls to themselves for their less tech-savvy parents, for example.
Why you wouldn't use Skype
- Group video calls cost extra.
- Credit expires after 180 days of inactivity.
- Some Skype plans also include a one-off connection (flag fall) fee every time a call is made. As Skype reception can be patchy you may need to call a few times to get a good line, which can eat into your credit.
- As with most VoIP services, you also need a working internet connection, whether on your phone or computer.
Viber allows you to text, call, have group conversations and share pictures with other users. It is easy to use – the joining process is quick and doesn't require you to add your contacts manually. Once you sign up and enter your mobile phone number, Viber syncs your contacts, messages and call history with your mobile.
The trouble is, this convenience comes at a price – privacy. According to Viber, "when you install the [app] and register on the site, you will be asked to provide us with your phone number and to allow us access to your mobile device's address book". This information is used to tell you when one of your contacts signs up to Viber and whether they're available to chat.
- Viber is free, convenient, and available for most platforms and operating systems.
- Free group calls are supported.
- You can only call other people who have Viber.
- The storage of your contact book, with neither your express permission nor the permission of third parties, is a concern.
- You must be online to use it.
If you're not keen on using an intermediary to call overseas and would prefer something with less mucking about, consider your internet service provider (ISP). Some ISPs, including iinet and TPG, set up home phone line rental and cheap VoIP calls straight from your regular phone.
And some mobile phone operators, including Lebara, Hello Mobile and gotalk, can bundle cheap or free international calls with your mobile phone plan, allowing you to make international calls directly from your handset. But make sure you check the rates for the country you're calling before ringing a new destination.
Not only do they host other companies' telecommunication apps in their stores, tech world giants Apple and Google have released their own solutions, too.
Apple's FaceTime facilitates free video calls between iPhones, iPads, iPod touches or Macs. The app is now preloaded on Apple products and requires very little setup.
Google Hangouts is less proprietary and can be used on non-Google/Android operating systems and devices. Not only can you connect to friends who've also got the app and group chat for free, but you can also stream your Hangout live on YouTube.
But what if you're after a brief tête-à-tête rather than a full-blown conversation? Good news - for those times when everything you need to say can be put into a message, there are apps that allow you to send free picture, text and video messages to anyone in the world.
WhatsApp, available for iPhone, BlackBerry, Windows Phone, Android and Nokia smartphones, is a cross-platform mobile messaging app that allows you to exchange free text and voice messages with friends who also have the app installed. Users can create groups and send each other unlimited images, video and audio messages. After an initial year-long free trial period, WhatsApp costs US$0.99 per year.
Phone calling cards are another option if you don't have an internet connection, or you prefer to use your home phone or mobile to call abroad, but they come with their own set of problems. CHOICE has been reporting on dodgy card operators for years and warning consumers to be aware of a range of extra and undisclosed fees and surcharges.
ACMA warns consumers considering buying a card to ensure the provider is a Telecommunications Industry Ombudsman (TIO) member and to check the small print for details on hidden fees. Using your mobile phone will still incur local charges from your telco, so make sure you're not racking up a mobile phone bill while trying to keep your overseas costs down.