Purchase a Calling Card
Although it may not be the least expensive method on a per-call basis (depending on the card), and it is less convenient than having a cell phone on you, calling cards are popular with international travelers because they have fixed prices and are familiar to most people.
Bring Your Own Cell Phone
The most convenient option is to bring your current phone with you when you travel abroad. If you have a GSM phone, you’ll most likely be able to use it wherever you go. Most of the world (more than 80% according to the GSM Association) operates on GSM.
In addition to the extra fees you may incur when using your phone while traveling internationally, the phone must meet these requirements:
The phone must be a GSM phone. Although most phones outside of the U. S. are GSM, some Verizon and Sprint phones in the U. S. operate on CDMA cellular technology; these work only in the U. S. T-Mobile and AT&T use GSM phones. The GSM phone must operate on the right band or frequency. U. S. GSM uses the 1. 9GHz and 850MHz bands. Europe GSM operates in the 900MHz and 850MHz bands. When traveling internationally, use a tri- or quad-band GSM phone for compatibility. Check with your phone manufacturer to find out if your model has this.
Rent a SIM Card for Your Cell Phone
If you have a cell phone that meets the technical requirements in the country you’re traveling to, avoid data roaming fees from your local carrier by renting a SIM (subscriber identity module) card that works in your destination. This is typically less expensive than using your current provider’s international pricing or renting a cell phone.
The GSM tri- or quad-band phone must be unlocked. Most cell phones are unlocked from their networks and most service providers will help you unlock a phone. Locked phones can only be used on the network of the cell phone carrier from whom it was purchased. Search the web to find cell phone unlock codes, hacks, and services.
Rent a Cell Phone
Though more expensive than renting a SIM card, renting a GSM cell phone that works at your destination allows you to be reachable at all times and to make calls.
Use VoIP Calling From a Computer or Phone
Using internet-based phone services such as Skype, which rely on VoIP (voice over internet protocol) technology, can be the cheapest way to make international calls. It might even be free if you use a free Wi-Fi hotspot (are free Wi-Fi hotspots safe?). Using VoIP from an internet café can be relatively inexpensive, but both Wi-Fi hotspots and net café usage depend on your physical presence at a specific location. There are a handful of free VoIP apps that can connect you with the rest of the world.
You can also use VoIP on your laptop using prepaid international mobile broadband.
