It is naturally a good thing to always carry some cash when traveling, but it simply is not necessary to stuff your wallet with too much cash when you travel to Thailand. Banking services, ATM's and money exchange outlets are available everywhere including at the airport. Drawing money in Thailand is as simple as drawing money in your home country. You can draw Thai Baht from ATM machines which are located everywhere in Bangkok, on the islands and even small villages and town.
Master and Visa cards are commonly accepted as are most other major credit and debit cards. Credit card facilities are available at all Thailand hotels and resorts, shops and also many restaurants. The exchange rate is automatically applied when drawing money from ATM’s and is roughly what you can expect when exchanging anywhere. Money exchanging outlets are available everywhere, especially in tourist areas of the country including the islands, smaller towns and not even mentioning Bangkok.
In the event that you may loose your credit card, contact the credit card companies in Bangkok on the following numbers:
Master Card(02) 260-8572
Diners Club(02) 238-3660
Thailand internet services and internet access in places like Bangkok, the islands and basically all towns are as available as ATM’s. Most resorts and hotels offer internet services on average for three Thai Baht per minute. There are also various internet café’s available all over the country and all the islands. Many hotels offer WI-fi internet access for free through-out the premises including in your room while some charge a hourly, daily and weekly fee.