Phone plan

Hi everyone. I will be moving to Taiwan on the 22nd if September. I need a new phone for mysel and my fiancé. Inward wondering if any phone companies had 1 year plans or monthly plans with a free phone. I was hoping to find something with unlimited Internet and text messages. The callig is not so important for me by if I is included in the plans hat would be great. Does anyone know which companies to look for or if it is better to buy a phone then use a prepaid plan. If you need any more clarification please feel free to ask me.