True. There might be other more expensive contracts, but most people in Taiwan that I know either have a "real" unlimited data contract for like 17 USD per mont

True. There might be other more expensive contracts, but most people in Taiwan that I know either have a "real" unlimited data contract for like 17 USD per month or a "fake" unlimited contract (with like 25GB and reduced but still acceptable speeds afterwards) for about 14 USD per month. One example provider would be Tstar. Nobody uses SMS anymore.