What is a one-sentence summary of the following article?
If you’ll be calling Hawaii often from an international number, your phone provider might be able to add an international plan to your bill. Be sure to ask about additional fees and the number of minutes per month, in addition to the cost of the plan itself.  If you’re making a lot of calls, this can be a logical and very inexpensive option. Sometimes, the company can apply discounts, so ask the provider if they’re able to give you a deal for being a loyal customer. International calling cards are a cheaper way to make calls from other countries to the United States, and you can find them at most grocery stores. Make sure you get a card with the correct amount of minutes, a low maintenance fee, and an expiration date that will give you enough time to use your minutes.  To use the card, dial the access number on the back of the card, type in the PIN that is printed on the card, and then type in the phone number of the person you are calling. For some cards, the PIN will be printed on the receipt for your purchase instead of the card in order to prevent theft. Be sure to keep track of your minutes when using your card. Write down the duration of your calls on a notepad so you know how much time you have left on the card. Companies like Skype, Viber, WeChat, and WhatsApp all provide Voice over Internet Protocol services, which allow you to place calls to other users and phone numbers for a small fee. Some services charge a flat rate for all calls, and some are free for calls to other VoIP users.  In order to make these calls, you have to have strong internet connection in your area. Be aware that while the calls may be free or low-cost, your internet or phone company can charge you for data usage. Apps like Facebook Messenger, Kik, and WhatsApp, and WeChat also allow for phone calls over WiFi via your smartphone to other users of the app. Simply download the app on your phone, create an account, and place voice and video calls all over the world for free or a very small fee. Again, although these services are free, be aware that your phone or internet provider can charge you for data usage if you go over your allotted amount per month.

Summary:
Contact your phone provider to update your plan. Purchase an international calling card to pre-pay for minutes. Use a VoIP service to place your call. Download a messenger app to chat.