SIM cards and top-ups are available widely in Thailand from the major carriers (the big three: AIS, dtac and True Move H) as well as a number of smaller 'boutique' provides that lease government bandwidth and equipment or MVNO (such as iMobile or Tune). Purchase of a new SIM card/number is easy, and can be done at operators' shops and any 7-11 as well as at many airport kiosks. Thailand is beginning to require SIM card registration and the production of ID (such as passport for non-Thais) may be required.