Many sailors heading for New Caledonia need to know if their mobile phone or tablet will work here - and for that they need to know the 4G and 3G bands used in New Caledonia AND the frequencies available on their own phone or tablet.
New Caledonia uses these frequencies with 3G covering almost all of the coastline and lagoon of Grande Terre, the Loyalty Islands and Isle of Pines. (The Cruising Guide to New Caledonia gives you the actual signal strength in each anchorage).
4G Lte Bands 3 (1800MHz), 7 (2600MHz), 20 (800MHz)
3G WCDMA Bands 1 (2100MHz H-IMT), 8 (900 MHz E-GSM) (Normal for Australia, New Zealand and Europe - not for US or Japanese phones).
GSM works with almost all phones.
Of course you MUST have an UNLOCKED phone to use a local pay-in-advance sim card (roaming is idiotically expensive but the local pay-in-advance sim card data is wonderfully inexpensive). So after making sure your phone or tablet is unlocked you need to find out what frequencies it has by visiting:http://www.gsmarena.com/