I have a trip coming up shortly to Fiji, Australia and Hong Kong. I'll be in Fiji for 4 night, Hong Kong for 2 nights and Australia for 17. Currently I have Verizon here in the states as my cell provider. Any suggestions as to the best plan for traveling to these countries or other suggestions? Obviously I'll use wifi where and whenever possible. Additionally I have MagicJack, Viber and What's App loaded onto my phone. Thanks for any help or suggestions!