For North American users, please prepare a quad-band phone that support GSM900/1800MHz frequency. If you plan to use it on Laptop computers, please prepare a USB 3G modem that support GSM 900/1800 frequency (WAP / GPRS / UMTS / HSDPA). You may check your phone specs with your phone's user's manual, or check it online.
(Please note: Do NOT connect to the web until you successfully purchased the data package, or you will be charged at a very expensive pay per use rate.)
This SIM support international roaming in multiple countries. The rate is often cheaper than bring your own SIM from USA/ Canada. Some sample rates when roaming in Europe areas in below. For more detail, or update information please check O2's official international rate.