- When you are abroad and turn on your wireless phone, it will automatically search for a wireless network. Registration usually occurs within 30 to 40 seconds. When the name or network number of the local operator is displayed, your phone should be ready to use.
- Most phones are preset to roam automatically, which means that the phone will switch networks as you move from one country to another. However, when you arrive at certain international destinations, it may be necessary to turn your wireless phone off and then back on again so that it recognizes the local wireless network.
- Charges for calls placed while roaming internationally will appear on your regular wireless bill. Sometimes charges for international usage take several weeks to process and appear on your wireless bill.
- Calls made to voicemail when roaming internationally are billed at international rates.
- The 911 emergency number is unique to the U.S. In many European countries, the emergency number for police, fire, and ambulance is 112. Outside Europe, emergency numbers vary by country.
- To charge your phone abroad, you will need a universal phone charger and plug adapters for the countries you are visiting.
- In some countries, using a wireless phone while driving is prohibited. Contact the local tourist information office for details on local regulations.
- Four frequencies (850/900/1800/1900 MHz) are used for wireless services worldwide. 3G frequencies include: 2100 3G; 1700/2100 3G.Each phone has a radio transmitter-receiver that works on one frequency (single-band) or on more than one frequency (multi-band). Since frequencies vary from carrier to carrier and country to country, you'll need a device for international roaming that works on the frequency where you're traveling. If you have a "quad-band" device, it will work virtually anywhere there's a wireless signal.
- Unless your wireless phone's frequency band is set to "automatic," you may need to change the frequency setting on your phone to match the frequency of the network in the country you are visiting.
- To ensure the broadest coverage, a quad-band (850/900/1800/1900) device is recommended. To roam in Japan or South Korea, a 3G device that operates at 2100 MHz is required