When travelling off-island, here are some useful tips if you wish to use DOCOMO PACIFIC's Postpaid Roaming Services. The SIM Card on your phone determines whether roaming is available in the country you're visiting. Visit https://www.docomopacific.com/shop/mobile/postpaid/roaming for more information. If you're using an older style SIM Card you can switch to the NEW Multi-IMSI SIM Card for FREE. This will ensure you have access to the best roaming capabilities available.