If you have a Bachelors degree (legal requirement in Thailand) and you fall within their preferred age range you may get a teaching position and a Non B visa and the school usually has a bank they prefer to do business with. They will usually assist you in opening the account. Having the Non B visa and work permit will usually make it easier to open a bank account at whatever bank you choose as well as getting a post paid SIM card with the phone provider of your choice.