Good mobile phone plan

Hi, will be moving to bkk for 2 or 3 yrs in july this year. Would like to get info about a good phone plan. I would be using internet from my phone mostly for mail, browsing,social media sites. will not be making lot of local or international voice calls. Should i have. Prepaid or a postpaid?
Thanks in advance.

Mobile plan in Thailand have three big company. I think you should use prepaid because it is comfortable for  you when you are not alive in Thailand.

I would go with a prepaid service in case it does not meet your requirements you can change service providers.