USED THEIR SIMS FOR THAILAND! They commit diff plans at airport and bill differently. One cannot do anything later on as payment is debited to credit card account.
One gets trapped with the convenience of getting SIM at airport but in the end it all just fleecing people at airports. Also returning the sims a big hassle. They keep on billing for two cycles even for a one week period.
DON’T USE EVEN IF FREE.