SIM card sales location of Narita Airport Teminal3. Doorway of Second Floor at the Main Building. No.20 ・SIM Company：U-NEXT ・Type of SIM Card Sold：U-mobile Prepaid SIM Card ・Plans ※200MB/day. Speed goes down to 200kpbs once it reaches 200MB/day until 11:59PM that day. The limination will be lifted the following day. 7days 1,800yen、15days 2,800yen、30days 3,500yen. The size of the SIM card is three types（normal , micro , nano）. ・Settings Each plan will be automatically cancelled after the assigned service period expires.