There are specialized agencies who specifically deal with the International Phone Cards to Spain. These agencies are available both in Spain and in most of the other countries. The cards can be bought online as well.
They are available for varied denominations. It is available for smaller denominations also so that the caller can take the card which suits his budget. However, before purchasing the caller would do well to short list the long distance calling companies. The company should be selected based on their reliability and quality of connectivity, availability of help line etc. Helpline is very important to get quick connectivity and for ascertaining the balance available in the card etc.
The callers have a tendency to select the low tariff rate, assuming that such tariff plan would result in savings. In reality it may not. Because, low tariff plan will normally have hidden cost and ultimately low tariff would be uneconomical. Therefore, before selecting, the caller should carefully read the terms and conditions of the tariff plan. This tariff plan can be purchased from any of the retail outlets like grocery shop, coffee shop, bars etc. It can be purchased online also.
Normally, the phone cards will have some validity period which varies from one calling company to the other. Therefore the tariff plan should be purchased depending on the need. However, there are many companies who allow balance in one card to be transferred to the other. The caller should use this utility. It is estimated that by proper selection of the card, it is possible to affect a savings varying from 50% to 80% which would be a great savings.