For people who travel a lot, it might seem like a problem that roaming charges are to be meted out by him every time he goes to a new place. Therefore with this kind of service, he can easily switch the network to a local operator to save his roaming charges.
Also, the consumer can use the utilities that are available with the phone only after paying for them. He has to pay first and then later on when his phone has been credited with the spent amount, he can use the features and services offered and keep his expenditures in control. This way he can save himself from the heavy monthly bills that sometimes go out of hand as you do not know the usage that you have done.
Very advanced handsets are available with this scheme where you pay as you go. Renowned brands like Sony, Ericsson, LG, Samsung etc offer handsets with these services. Also various other benefits are available with the handsets like free text messages, free talk time, free services etc. Go online to get these services as there are many other offers clubbed and also the costs are very low with a wide range of handsets to choose from.