find out what best line there. Celcom Yes or Maxis. Then look for the strong signal in the house to place the 4g modem. Buy the sim then use as you like. Mikrotik got the best 4Gmodem but a bit pricy. I got my Ltap mini is super fun to bring to everwhere. Battery can use power bank or normal power heck even car battery. Cannot overheat big heat sink.