You can now make international calls from most of the hotels, but calls are very expensive and can cost up to 7 USD a minute. It is important to ask about the price beforehand in order to avoid unpleasant surprises.
It is now quite easy to make International Direct Dial (IDD) calls from Rangoon. However, this might be more difficult from certain areas such as Inle lake, Pindaya or Moulmein where you most certainly will have to make your call through an operator.
Receiving a call from abroad is very difficult in Yangon and almost impossible from another area of Myanmar.
Over the last few years mobile telecommunication systems have improved somewhat. It is now possible to bring your mobile phone into the country and you will not be questioned as you pass through customs. However, foreign network subscriptions are not effective in Myanmar...
People who have tourist visas should theoretically not bring a laptop computer into the country; however it is possible to do so. For those who have a business visa there's no problem at all, although it is advisable to declare your laptop on the "arrival card" distributed in the aircraft.
Whatever computer you have, you won't be able to connect to the Internet from your laptop.
Cyber Cafes are now available in most of the big cities in Myanmar (Yangon, Bagan, Mandalay, Bago, Moulmein, Nyaung Shwe, Hpa An), so you should not experience major problems browsing the internet.
You can connect to most of the Internet sites, including sites such as Yahoo or Google. However it is sometimes not possible to access the webmail services that those sites offer, and it can therefore be difficult to access your personal mail.
Checking your email is not always an easy task. In rare instances it is possible to make IDD calls through the internet from certain Cyber Cafes. This is a much more economical solution than the traditional phone.