back about eight years ago. Be aware that the banks don't work like here in Australia. Each branch is considered a branch in its own right. If you open an account say Pattaya and withdraw say Bangkok you'll be charged a fee.
You might need to get a head man to vouch for you. Though I opened a bank account with Kbank in Pattaya with no problems. However, the government has tighten up the rules for foreigners to have a bank account.