Internet access in Cambodia
If you want to get online, do it in Phnom Penh or Siem Reap - here you're never far from an Internet shop or café and rates are under $1 per hour. In the provinces it's a different matter: even in Battambang and Sihanoukville access is limited, and expensive at around $3 per hour. One of the best ways to keep in touch while traveling is to sign up for a free email address that can be accessed from anywhere, for example Yahoo Mail, Hotmail or Skype. Once you've set up and send mail from any Internet Café, or from a hotel with Internet access.
There are Internet Service Providers in Cambodia such as Online, Telesurf, AngkorNet, Mekong Net, WirelessIp with reasonable price. Prepaid Internet Card is available at any shops and super markets and price is starting from $5 to $100.
Recently, there are many restaurants and cafe shop like the M Cafe, the Corner restaurant, Cafe Sentiment and more offers free internet access with WI-FI - there you just bring your own laptop only.