But now that the price to buy a GSM phone has come down dramatically, you can often buy the handset and the SIM card for less than the cost of a rental for your trip.
If you have brought or rented a GSM phone, you will be given a phone number registered to the country of the SIM card.
In some of the more developing countries, such as those in Africa, you can use your GSM phone in only the largest cities.
Traditional dual SIM GSM phones enabled callers to toggle between their two phone plans, but Unnecto takes this technology a step further; in each of the manufacturer's GSM mobile phones, the two plans can operate simultaneously.
Unnecto has also hinted that a third new device, the CURVE, will soon join its collection of dual SIM GSM phones.
Alongside the benefits that consumers can reap from dual SIM GSM phones are a host of other great features.
Unnecto's line of dual SIM GSM phones is an asset to consumers for a number of reasons.
Unnecto recently redesigned its website to better introduce consumers to its range of six dual SIM GSM phones. With a clean and stylish aesthetic that matches that of its products, the website details the features particular to each phone model.
Unnecto's state-of-the-art dual SIM GSM phones allow users to use a single device for two lines, enabling both SIM cards to operate at once.
The beauty of our dual SIM GSM phones is they can all be used just nationally, just internationally, or both, and they don't come with the hefty price tag so many other international phones do,” said Unnecto's Daniel Moy.