They can then connect unlimited times to the Internet. This kind of service is great for business people. They can now receive important messages without interrupting meetings. It is also useful if you need to contact someone on the other side of the world, and are concerned with the difference in time zones. In most situations you can send messages of limited size, so you would need to be concise.
Email is fast, efficient, and at most times, free.
Most GSM phones are able to connect to their WAP services anywhere that they have service. Getting a GSM phone GSM phones can be expensive to buy. The usual factors in cost are available options and model. The options, like any local calling plan, include minutes and accessories. There are various services that rent global wireless phones at competitive rates.