Just like traditional Suica cards, Mobile Suica can also be charged when the remaining balance gets low. Other features supported by the mobile phone includes the ability to review past Suica transactions via the mobile's display. Suica uses Sony's FeliCa chip for its main functionalities. Mobile Suica interacts with the FeliCa chip using Java technology.
Since October 2006, it is possible to register for Mobile Suica using any major credit card, a Suica VIEW card is no longer required. A limited e-money only application called "Easy Mobile Suica" (which does not require a credit card) was also launched in late October 2006.